Research vs . Practice on Manufacturing Firms ’ Servitization Strategies : A Gap Analysis and Research Agenda

Servitization in the manufacturing industry implies a shift from an offer based mainly on standard goods, to a wider value proposition composed of solutions aimed at solving specific customers’ problems, obtained by integrating tangible and intangible elements. The purpose of this paper is to investigate the servitization strategies of manufacturing firms, more specifically about: (i) how manufacturing companies move toward servitization (servitization pattern); (ii) how they achieve the capabilities needed; and (iii) which factors enable this transition. We did so by comparing the state of the art of academic research with a qualified sample of case studies of global companies that famously improved their competitiveness by shifting from products to solutions. The results show some gaps between research and practice, concerning in particular: the impact (either transformational or integrative) of servitization on the manufacturing organization; the role of financial resources in shaping the capability achievement strategy, particularly for external acquisitions, and; the role of servitization enablers poorly considered by the extant literature, such as time, leadership and continuity, operational excellence and digital technologies. These findings lead to the definition of seven formalized research directions, thus outlining an agenda for future research.


Introduction
Services are increasingly taking the lead in the global economy, in terms of both wealth produced and value added [1].The service component of GDP in most OECD countries has reached 70% of total gross value added and about 50%-70% of employment [2,3].This phenomenon is not just about macroeconomics: it involves a radical shift in the way people and companies produce and use goods and thus it is transforming entire industries, companies and lifestyles alike.
In manufacturing, services have been traditionally deemed as a necessary evil [4]: nevertheless, for a few decades [5], an increasing number of manufacturing firms have been shifting from pure products towards integrated offerings encompassing services and products.This is related to structural changes occurring as products mature and markets globalize, such as an increased level of competition, changes in consumer expectations and reduced margins [6].As a consequence of this shift, the traditional boundaries between products and services have become increasingly blurred, and services are progressively accounting for a greater share of revenues and profits of manufacturing firms, both in business-to-business and business-to-consumer sectors.
In parallel to this shift in business practice, the academic community has turned its attention to the "servitization" phenomenon [7] as highlighted by the growing amount of research published in scientific journals [8].Several authors discussed the importance of services in manufacturing, their rationales and effects [9][10][11][12][13][14]: this has greatly improved the way servitization is understood and addressed at both the academic and industrial level.Yet, few studies reveal the realities of enacting such strategies through empirical investigation: rather, normative and prescriptive models on how to achieve success dominate the current literature, but they offer little insights into how attempts to integrate products and services actually occur and the real challenges encountered by servitizing organizations [15,16].The risks of failure of the servitization process are high [13,17,18] also because companies may fail to innovate their business models coherently to the new offerings [19][20][21].A need for empirical research to help determine the importance of contextual factors and differences across industries has been acknowledged [13,22].
For these reasons, we decided to further investigate the servitization process, by comparing research findings in the scientific literature with seven exemplary servitization case histories.For this purpose, the remainder of the paper is articulated as follows.The next section describes the methodology adopted; Sections 3-5 discuss in depth the research-practice gap analysis, focusing on this paper's three specific topics.Section 6 provides some concluding remarks and directions for future research.The Appendix A presents instead a detailed description of each case.

Research Framework
The term servitization was coined by [7] as "the shift of manufacturers to couple their products with services to generate revenues and broaden their position in the value chain".More recently, the definition of servitization that has gained most support in the literature was developed by [14] (p.512), stating that servitization is "the innovation of an organization's capabilities and processes to better create mutual value through a shift from selling products to selling product-service systems".However, the scientific community has long debated also what is a "product" and what is a "service" [23].Differently to the traditional wisdom following which a product is tangible whereas a service is intangible, we adopt the view that considers as the distinctive element of services with respect to products the presence of customer inputs, i.e., customers are also suppliers for service processes [24,25].Revising Baines definition in the light of this characterization of services, we can define servitization as the shift from selling mainly standard goods, to providing custom solutions crafted to solve specific customer problems.This definition clearly shows the convergence between the concept of servitization and the concept of solutions or integrated solutions, defined as "innovative combinations of products and services leading to high-value unified responses to customers' business and operational needs" [26].
According to the scientific literature and the previously described objectives, we focus on three key aspects to describe how companies can shape their servitization process: 1.
the servitization pattern, that is how a servitization transition can be modelled and described both in terms of its trajectory and final impact; 2.
how capabilities to support a successful servitization transition are achieved (e.g., internal development or external acquisition); 3. the enablers of servitization, i.e., the endogenous or exogenous factors that facilitate or support the achievement of a successful servitization process.
Figure 1 depicts the research framework followed in the paper.First, the discussion and development of our definition of servitization, provided above, informed both the literature review procedure (in particular the selection process) and the case study selection, as it will be described in Sections 2.2 and 2.3.The detailed description of the cases is presented in the Appendix A, while Sections 3-5 provide a discussion and comparison of the findings from the literature review and the cross-case analysis.Each section focuses on one of the three key aspects of servitization mentioned above: pattern (Section 3), capabilities achievement (Section 4) and enablers (Section 5).As on outcome of each section, we develop propositions summarizing the elements of convergence and the gaps between theory and practice.In the conclusion, drawing from these propositions, and the gaps in particular, directions for future research are pointed out.

Literature Review
A systematic literature review was carried out in order to analyse the theoretical perspective on the servitization of manufacturing companies [27,28].The literature search was performed on the SCOPUS database, to ensure coverage of diverse disciplinary areas, as done in recent works in the field [18].The literature selection follows the five steps reported in Figure 2 and described hereafter.
Systems 2017, 5, 19 3 of 28 elements of convergence and the gaps between theory and practice.In the conclusion, drawing from these propositions, and the gaps in particular, directions for future research are pointed out.
Figure 1.The research framework.

Literature Review
A systematic literature review was carried out in order to analyse the theoretical perspective on the servitization of manufacturing companies [27,28].The literature search was performed on the SCOPUS database, to ensure coverage of diverse disciplinary areas, as done in recent works in the field [18].The literature selection follows the five steps reported in Figure 2 and described hereafter.First, a keyword search was carried out in SCOPUS, to be found in title, keywords or abstract.In particular, we searched the terms "Servitization", "Product-service system" and "Integrated solution(s)", since these three terms emerged has central to the definitions of servitization discussed above, and were expected to provide a broad coverage of the topic.This initial search led to the identification of 1990 published (or in press) until the end of year 2014.
Second, a selection of the results based on the document source was made: only papers published on peer reviewed journals were retained, as this was considered a guarantee of the quality of the paper.In this step, also duplicate results were removed.First, a keyword search was carried out in SCOPUS, to be found in title, keywords or abstract.In particular, we searched the terms "Servitization", "Product-service system" and "Integrated solution(s)", since these three terms emerged has central to the definitions of servitization discussed above, and were expected to provide a broad coverage of the topic.This initial search led to the identification of 1990 published (or in press) until the end of year 2014.
Second, a selection of the results based on the document source was made: only papers published on peer reviewed journals were retained, as this was considered a guarantee of the quality of the paper.In this step, also duplicate results were removed.
Third, the 811 papers in the sample after the second step were selected based on the attention received in the literature.As to ensure a minimum impact of these papers on the research community, we retained only papers that received at least one citation per year on average, according to the data extracted from SCOPUS, i.e., that have a number of citations equal or greater to their age computed as the difference between 2014 and the publication year.This criterion was not applied to papers appeared in 2014 that were all kept in the database, regardless of the number of citations.
The 389 papers resulting after this step, were scrutinized based on a title and abstract reading, to assess their relevance for the objectives of this paper: such a procedure is quite common and has been adopted in other literature reviews in the field [8,29].
The 117 papers in the sample after this step constitute the core of the literature sample.In step fives, the database search has been complemented by cross-referencing for further relevant publications in order to overcome possible limitations related to the database or keyword search [28].Another 23 papers were added in this step, reaching a total sample of 140 papers that were object of the literature review.
A descriptive analysis of the literature sample has been carried out, and is summarized in Table 1, showing the temporal distribution of the papers and Table 2, showing the distribution among journals.Table 1 shows that all the selected papers except two appeared after the year 2000.In particular, 74% of the sample articles have been published in 2010 or later, confirming the great increase of the research community attention on these topics occurred in recent years.Table 2 shows instead that the topics have gained the interest of a large and diversified research community, as already pointed out by [8]: the literature review covers 57 journal in total, only 18 of which appear with 3 entries or more.Industrial Marketing Management is by and large the most represented journal, with 19 papers.

Case Studies
We chose the cases among manufacturing companies that have achieved an uncontroversial success by applying an innovative and "servitized" business model, in the sense described by the previously mentioned definition.Rather than looking to small or medium-sized "next door companies", we resorted to the exempla supplied by large and famous global companies.In facts, while by approaching SMEs it might have been easier to personally collect and check information, it proved practically difficult to find a sufficient number of firms fulfilling our requirements, and simultaneously available to supply the information and top management support needed, about the (ten years or more) timespan needed to analyse the transformation process longitudinally.
Thus, we started with around 20 famous servitization cases of (typically) large multinational companies.Not all of them were found to be equally successful: for instance Nokia, the Finnish cell-phone producer, was discarded on the account that the company failed to understand and address the smartphone revolution, and was eventually acquired by Microsoft.Moreover, not all of the remaining cases were supported by the same amount of information: thus we restricted our analysis to the cases for which we could find information sufficiently: 1.
time-pervasive, covering a time span long enough to thoroughly analyse the servitization transformation 2.
complete as to provide strategic, as well as tactical and operational points of view regarding the transformation process 3.
verifiable, thanks to the possibility to cross-check information and facts from different sources Our sources encompassed not just the scientific literature, but also technical and business reports: despite the fact that these secondary sources can introduce a methodological bias as compared to academic literature, they were essential both to collect the main financial results achieved, and to cover a sufficiently long time horizon.Cross-checking evidence from the company literature with critical reviews in the scientific one, we were able at to overcome such bias.We finally selected 7 cases, namely: Apple, Caterpillar, Dell, General Electric, IBM, Rolls Royce and Xerox.We selected the aforementioned cases for the following main reasons: 1.
Apple was considered for the integrated design, marketing and sale of product-service systems, first with IPod + ITunes, and then with IPhone + Apple Store.

2.
Caterpillar was taken into consideration because it famously and successfully leveraged on an internal competence on spare parts logistics in order to start up a new service business on a "lateral" business compared to its main one.

3.
Dell was considered on the account that it pioneered in the personal computing market a new and customer-centric business model, based on disintermediation and direct customer contact.4.
General Electric was considered as a leader in supporting the sale of capital goods with advanced financial services, and therefore because it proposed one of the first and most successful "solutions".5.
IBM was taken into consideration for its spectacular turnaround from being No. 1 global computers and peripherals manufacturer to achieving No. 1 position as global provider of information-related business services.6.
Rolls Royce was especially credited for launching one of the first and most successful technology-enabled outcome-based contract schemes in the capital goods market.7.
Finally, Xerox was also considered for pioneering the implementation of a "pay per use" business model in the printers and photocopying machine sector.
A detailed summary of each case study is reported in the Appendix A. A comparative summary of the findings according to the three main aspects object of this paper is reported in Table 3.

Servitization Pattern
Two different perspectives have been developed within the academic community, the incremental approach [11] and the radical one [30].The incremental approach describes the servitization process as a linear sequence of steps, through which firms extend and enhance their service offerings, in the so-called "product-service continuum", where the relative importance of services and tangible goods varies in a quasi-static manner from a product-focused offering to reach a service-focused one [11].This incremental approach is evident in most transition models proposed in the literature [10,11,[31][32][33][34][35] and generally focuses on the services' role in the interaction between suppliers and customers.Opposite to the incremental approach, the radical perspective posits that the competitive advantage is achieved not by progressively moving towards solutions, but by changing business model and organizational structure quite disruptively [9,[36][37][38][39].Davies [40] argues that such a shift is difficult to accomplish without challenging the current power structure, rejecting traditional ways of thinking and parts of the old culture, creating new organizations, and establishing new capabilities.Other works [12,41,42] point out that this process might not be linear, because it can often encompass trials and errors.
A seemingly incremental approach was applied by 3 of the 7 scrutinized companies, namely IBM, Rolls Royce and Xerox.IBM's servitization process occurred in three main steps: firstly, mainly under Lou Gerstner's tenure (1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003), the company switched from the manufacture of computers and peripherals to the offer of corporate consulting services.This was firstly achieved by resorting to mainly internal competences and resources (step 1), but it culminated with Price Waterhouse Cooper's buyout (step 2).In the following years, under Sam Palmisano's chairmanship, IBM re-directed focus towards highly specialized and high-tech software, through a bold acquisition campaign (step 3).
Also Rolls Royce structured its servitization turnaround in two sequential steps: in the eighties it introduced a "power by the hour" scheme, under which any customer airline was given the opportunity to pay turboprop engines' maintenance as a fixed cost per each accomplished hour of flight, over an extended time frame.During this phase customers still had to buy their engines, and could then choose as an option whether to activate the power-by-the-hour scheme or not.As a second step, the "total care" program was introduced, by equipping each new engine with the ability to collect and broadcast to a control center its main technical functioning data (such as temperatures, pressures, vibrations, etc.).In order to take full advantage of the abundance of data gathered from a contracted installed base that soon reached 54,000 engines in operation, Rolls Royce established Control and Data Services Ltd. as a subsidiary company specialized in data collection, storage and elaboration.This, in turn, enabled Rolls Royce to develop smart analytics to support and improve its ability to forecast engines' behavior and anticipate the need for spares, or the occurrence of field breakdowns.As a result, Rolls Royce's after sales efficiency and effectiveness was sharply improved, to the benefit of both the supplier and its customers.
Xerox underwent two main stages in its servitization process too: firstly, mainly during the first part of Paul Allaire's tenure (1990)(1991)(1992)(1993)(1994), it switched from the sale of copy machines, to the sale of copied pages: this move was seemingly triggered by the fact that Xerox's copy machines, despite commanding a technological and quality leadership in the sector, were too expensive for large segments of perspective customers.Then, from 1994 on, Xerox went further, by proposing its customers to outsource their printing processes, in a successful attempt to become the first and largest global provider of document-related services.Consistently, it switched its corporate payoff to "the document company".One noteworthy aspect in Xerox's servitization turnaround trajectory was the temporary break it experienced after Rick Thoman took over from Paul Allaire (1999-2001): during Thoman's tenure, the servitization process experienced a pause, and to certain extent it even backtracked, to be re-launched by Ann Mulcahy in 2001.
Four out of seven firms in our sample (Dell, Caterpillar, GE, Apple), instead, embraced a radical approach.For instance, Dell introduced from its establishment a fully new business model as compared to the personal computing industry standard, through which the distribution and sales tier was by-passed, in an effort to achieve direct relation with final customers.GE leveraged its leading position in the manufacture of capital goods in several industries, to offer its customers the financial services needed to fully benefit from their investments in GE's products: yet very soon it could exploit its know-how (and financial resources) to give financial support for other investments as well.Roughly the same happened at CAT that internally developed world-class competences in spare parts logistics, and successfully built a business out of this competence.Apple, instead, built an integrated platform by exploiting the digital convergence of several technologies, such as: computing, telecoms, navigation and imaging.
Hence, case evidence supports the existence of both the incremental and the radical approach.In particular, the cases of Caterpillar, Dell, GE and Apple indicate that a full commitment to servitization cannot be achieved successfully by only progressively shifting from product to solutions.This radical approach has definitely not received as much attention from the research community as it has been devoted to the incremental one.
Besides that, we find differences emerging from the cases with respect to the literature review.First, theory has it that even by implementing an incremental approach, companies are transformed from a product-focused to a service-focused offer: however reality is more complex.For instance, Rolls-Royce continues still today to offer the traditional transactional purchase option aside of the "power by the hour" and "total care" ones, in order to allow the customer to choose what best fits its requirements.In addition, even at IBM and Xerox, where the immaterial part of the offer has widely offset its physical counterpart, (physical) products' sales still account for a relevant part of the turnover.
A second difference between theory and practice is that unlike the assumptions of different authors, such as [10] or [11], the incremental transition does not occur always as a linear progression: it can be, conversely, more similar to a trial and error process, as it is particularly indicated by the Xerox case.
Third, independently from the fact that companies resort to an incremental or a radical approach in their path to servitization, we can distinguish two different types of impact of the servitization process: a transformative impact, in which the company completely changes its value proposition, branch of industry, business model and organizational structure, as compared to what it used to be before; and an integrative impact, in which the servitization process allows integrating and completing the company's offer, by proposing fully innovative solutions side by side with more traditional products or services.For instance, Apple with the first IPod introduced in 2001, developed a completely new and disruptive business model as compared with both what Apple itself did before and the consumer electronics typical practice.It developed and marketed a sleek design and very compact MP3 reader together with a Web-based IT platform that users could use to purchase and share contents they could play on their hard set.This business model was taken further in 2007 with the IPhone smartphone, which not only defined another Web-based platform that users can access to download applications, but also stimulated the establishment of an eco-system of independent software developers that can market their applications through the Apple Store, directly to IPhone users, and be rewarded with a percentage of the sale.These innovations in turn developed the market of contents for portable digital handsets of sort, such as digital books, music, films, games, or applications.Dell as well has introduced from its establishment a completely new business model as compared to the sector's traditions.Quite the contrary, both CAT's and GE's experiences point to an integration of their market offers rather than its transformation, exploiting their unique competences and competitive positions to develop new and very profitable businesses.In these two cases, previous and more traditional offers were not swept away by the servitization phenomenon, but rather completed by it.
Therefore, we understand from the cases that the incremental vs. radical approach is just one dimension of the problem, while another aspect of servitization patterns is whether the servitization process determines a business transformation or rather an integration within the old business.To this regard, the empirical evidence collected through the analysis of our 7 cases supports a bi-dimensional representation of servitization patterns, proposed in Table 4.In summary; while our comparison of theory and practice regarding the servitization pattern highlights some common ground; it also underlines that theoretical studies tend to perceive just one part of a more complex reality.The findings are summarized in the following propositions.

1.
Finding 1: Both the literature and the cases identify two possible approaches to servitization, an incremental and a radical one.The literature has paid particular attention to the former, while practice shows the latter to be equally, if not more, relevant.

2.
Finding 2: When dealing with the incremental approach, the literature depicts a linear path that goes from an initial product-focused offering to a final service-focused one.The cases, however, highlight that this process may not be linear but rather a trial and error one, and that it can end up with the coexistence of service-focused offerings together with more product-focused ones.

3.
Finding 3: The cases highlight that the servitization process, despite having an incremental or radical approach, can achieve either a transformative or an integrative impact on the servitizing organization.This perspective on the servitization pattern has been overlooked by the literature.

Servitization Capabilities Achievement
A successful shift to the provision of solutions integrating products and services requires new competences that typically lie outside the pure manufacturer profile, such as a service and customer-orientated attitude, pricing and service development and integration capabilities [43].Therefore, one key choice concerns how to achieve these capabilities, the two basic options being to develop them internally (make) or to buy them from outside (buy).
In the early servitization literature this issue is approached in a seemingly black-and-white fashion, in that some works suggest that capabilities should be developed in house [11], while others that they should be acquired mainly by integrating with other companies [9].[40] builds on the make vs. buy options, by defining the roles of the "system seller", that focuses on the internal development of the required capabilities, and the "system integrator", that combines capabilities developed externally with those available internally to provide its customers with unique solutions.In the first case, a make approach is adopted, with the main advantage of keeping in house the direct control on all the main components of the firm's value proposition.This control is beneficial, because it limits inter-organizational coordination efforts: however, internal capability development extends the set of capabilities to master, making it more difficult for the firm to specialize, and therefore to excel, in all of them.Moreover, the internal development of world-class and entirely new competences might require a long time (and substantial investments), while the market could require a faster achievement of capabilities [43]: this is why other companies resort to a buy choice.
Mathieu [10] adds the partnering option, as an alternative to pure make and buy strategies.In this case, capabilities are developed jointly with suppliers or customers, thanks to collaborations in service development or operational activities, or through the exchange of knowledge [36,43].Indeed, supplier relationships have been acknowledged to be critical in servitization [44], and some authors have even identified this ability as a "partnering competence" [22,45], but only recent works studied how buyer-supplier relationships in servitized contexts are configured and connected to the service portfolio offered [46][47][48].
In the case studies we found a mainly internal capability development at Dell and Rolls Royce.Rolls Royce, for instance, resorted to mainly internal resources and competencies in developing its servitization processes, starting from a consolidated model that had to be evolved (opposite to Dell that started a new business model).In particular, within Rolls Royce's "total care" program the availability of a large amount of real-time data triggered the internal development of new competences regarding on the one side complex equipment availability and maintenance, and on the other side how to provide real-time analytics that can support more informed and timely fleet maintenance decision-making.IBM adopted a mixed approach: first the company focused mainly on the internal development of the new competencies, needed to switch from the design and manufacture of industrial business machines, to the delivery of IT-based corporate consulting services.Since its servitization was mainly triggered by worsening financial results, this was accompanied by the spin-off of the stagnant Lexmark brand of laser printers, and by the lay-off of more than 100,000 employees worldwide.These actions had the effect of fixing IBM's troublesome financial results, by injecting new cash, reducing costs and re-focusing the company on more profitable competences and markets.Once corporate financial results were re-established, in 2002 IBM purchased Price Watherhouse and Coopers, one of the largest management consulting firms worldwide.This acquisition approach continued when Sam Palmisano succeeded to Lou Gerstner as a CEO, albeit with a slightly different orientation.Palmisano's vision in fact was leaning more towards advanced application software than consulting services: thus, IBM went on in its acquisition campaign by purchasing hundreds of software companies worldwide with an offer complementary to its own.This phase of IBM's servitization process was also mainly financed by the spin-off of large corporate manufacturing assets, such as the PC business unit, sold to Lenovo in 2005 and the hard disk drives manufacture sold to Hitachi in 2010.
Apple, as well, adopted a mixed approach: while it mainly relied on internal resources to develop the technologies needed to make its new business model effective and devise its product's sleek design, it nurtured an eco-system of software developers willing to market their products through the (internally developed) Apple Store platform.Therefore, Apple's approach was more oriented to develop business relationships, differently from IBM that resorted to the purchase of external competencies complementary to its own ones.With this approach the number, range and quality of the solutions offered by Apple to its customers through the Apple Store rapidly soar, and it did not require the amount of fixed investments that IBM had to deploy: therefore Apple was not forced to sell any of its fixed assets in order to finance its conversion from a product to a solution company.
Xerox and General Electric resorted mainly to external acquisitions in order to accomplish their servitization process: for instance, Xerox purchased Affiliated Computer Services in the strive to establish its lead of printing processes outsourcing, while GE purchased 338 businesses between 1981 and 1988 alone.In particular, GE's Jack Welch famously adopted a very straightforward strategy that leveraged on GE's scale, declaring that he would only accept to invest into one business if GE had the opportunity of rapidly becoming No. 1 or, at worst, No. 2 player in that business worldwide.Following this strategy, he closed or spun-off several of GE's less profitable or promising business units, and GE also laid off more than 80,000 people worldwide.
A summary of the (main) capabilities achievement strategies adopted by the case companies is reported in Table 5.Following Table 5, the analysis of business cases suggests that companies may achieve the needed competences and capabilities in a variety of modes, from uniquely inside to uniquely outside of the corporate perimeter; moreover, in particular the Apple case underlines that instead of purchasing the external competences needed to accomplish the servitization process, a company can resort to an eco-system of business partners that concur in developing and marketing the solutions.Thus, the scrutinized cases provided a picture that remarkably fits with theoretical models presented in the literature on how servitizing companies can achieve the required competences.
Nevertheless, the servitization literature seems to overlook the relevance of external acquisition of companies and business, and in particular the role of financial resources in shaping the capabilities achievement strategy.In fact, company acquisitions require large amounts of financial resources.Yet, an adequate amount of cash might also be required when an internal approach is adopted, because a servitization strategy usually implies a lapse of time before the transition becomes profitable.Thus, a company needs to have adequate resources to sustain the introduction of solutions in its portfolio.It can therefore be assumed that to succeed in a servitization strategy a strong cash flow is needed either from operating business or from divesting.IBM, Xerox and GE achieved the required financial resources through the sale or spin-off of large fixed corporate assets, and the layoff of large numbers of employees whose competences were considered unnecessary or inessential.
We can summarize the findings in this section with the following propositions.

1.
Finding 2a: Both the literature and case studies show that internal development, external acquisitions and partnering/ecosystems can all be effective ways to achieve the capabilities needed in the servitization process.

2.
Finding 2b: The literature neglects the fundamental role of financial resources, pointed out by the cases, in the definition of the capabilities' achievement strategy and, in particular, for the external acquisition of capabilities.

Servitization Enablers
Matthyssens and Vandenbempt [49] identify the organizational structure, culture and human capital as key enablers to achieve a successful transition from pure manufacturing to the provision of integrated solutions.Galbraith [36] postulates that organizational dimensions (strategy, people, structure, rewards and process) need to move from being product-to customer-centric.Similar views are proposed by [10,50].Therefore, one internal dimension of change concerns, broadly speaking, human resources, organization and corporate culture.
Gebauer et al. [17] observe that there is another recurring pattern to achieve a successful transition, that we could label customer-centricity, including: establishing a market-oriented and clearly defined service development process; focusing service offers on customer needs; initiating relationship marketing; defining a clear service strategy; establishing a separate service organization and creating a service culture.Indeed, most researchers agree on the need to make the service organization an independent profit centre [11,17,40,51] for several reasons.First, the consolidation of a dedicated organization allows to better control profits and losses related to service activities [52]; second, it enables the relevance and (potential) benefits of the service business to be recognized within the company: this is particularly important in a traditionally product focused business [53]; third, the profit-centre organization acts as a shelter for the development and support of a service culture [11]; and fourth, running the product-service business separately mitigates the risk of moving outside existing organizational capabilities [37].
In addition, it is argued that the challenges associated to the development of a servitization strategy are connected to the relationships and interactions between actors in the value network [54].Solution suppliers become part of the customers' operations and increasingly rely on a network of partners: consequently, the development of integrated solutions has an impact on the relationships in the value network and vice versa [22].Consistently, an effective servitization process requires developing inter-organizational integration skills and a new approach to the management of supply chain relationships [44,48].Yet, due to the increased complexity of the offering and the need for more intimate understanding of customers' and suppliers' businesses, establishing and maintaining supply relationships presents risks and challenges [55][56][57].
Finally, knowledge management, in particular about the installed base, has been acknowledged as an important servitization enabler [16,58], allowing entering the installed base service market [11].
Other enablers are the firm size and service business scale.A large size has been implicitly suggested as a favourable factor for servitization, as most papers in the literature discuss the cases of large multinational firms, and explicitly verified by empirical studies.Neely [17] found that is much more common for large manufacturers to servitize compared to small ones, although this does not imply that larger firms are more likely to be successful in the servitization process.Even more, achieving a relevant scale in the service business, e.g., measured by the % of service revenue on total, seems a condition for success [17,59].
In summary, the scientific literature on servitization has explored several factors that can affect the outcome of a servitization process [16], such as: the internal alignment of corporate's organization and competences with the new strategic mandate; the organization's customer-centricity; the ability to form and manage networks and partnerships; the ability to achieve data and manage knowledge; the size of the company and scale of the service business.
The enabling conditions pinpointed in literature are also confirmed by the studied cases.For example, all of the analysed companies set a detached unit to manage and deliver integrated services.Such units either contribute to the firm's core business and therefore work side by side with product units, like at Rolls-Royce, or provide services independently like in GE Finance or CAT logistics.
Sometimes organizational changes are associated to corporate shakeouts and thus also the previous organizational structure is affected as it happened in GE's and IBM's cases, where thousands of employees were laid-off together with senior managers.This can be a way to achieve an effective change: as a matter of fact, one essential condition is to create a service culture and to adapt the corporate values and mission.The service culture is specific and different from the traditional manufacturing culture because it is based on a customer-centred approach, as opposed to a product-centred one and it involves dealing with intangible assets.
Size and scale were identified as important but not essential success factors in the case histories.In GE's case, the size of the company and its competitive position played a central role: the strategy implemented by Jack Welch in GE's turnaround, included the decision to spin-off any GEs activity that was not, nor had the opportunity to become soon, the leading or No. 2 competitor worldwide in its industry.In addition, IBM, CAT and Xerox were industry leaders at the time when they undertook the servitization transformation, and exploited their competitive position, corporate reputation and internal finances in order to support their turnarounds.Yet, other cases are different in this respect.Rolls Royce was a big player (albeit not the largest one) in the aircraft engine market at the time when it launched its power by the hour scheme (and it still is No. 3 worldwide), while Apple was a niche and troubled producer of computers when Jobs took over its chairmanship for the second time (1996) and Dell Computers' innovative business model was invented from green field when Dell was still just little more than a small garage start-up.
Besides the abovementioned factors, the case studies highlight other fundamental enablers of servitization, namely: time, leadership and continuity, digital technologies and operational excellence.
Several of the transformations of the case companies took place in around 10 years or even less, despite that: they may have required to transform the corporate culture, mission, vision and values and share them with tens of thousands of employees; sell and/or purchase large companies or parts of the corporate assets in order to better focus the activities on the new goals and provide how to finance the turnaround; lay-off or/and hire tens of thousands of employees, in order to re-align the corporate's know-how with the new strategy and/or improve the cash-flows; develop new technologies; establish new service networks; redesign the core processes and commercial offers and rolling them out, et cetera.Dell and Apple were both surprisingly fast in delivering unmatched operational as well as financial results: for instance, in 1999, just 3 years after the establishment of its e-commerce business model, Dell became worldwide No. 1 provider of personal computers, and in 2001 it also became No. 1 in industrial servers.Apple became the most valuable publicly traded company of all times in 2011, just 10 years after the launch of the iPod, 4 years after the launch of the iPhone, and 3 years after the establishment of the AppStore.Giant companies such as IBM and GE took just few more years to achieve dramatic turnarounds: at IBM, services soared from 20% of sales in 1992 to 60% in 2008, while its software products portfolio reached more than 10,000 different applications.In the same year 2008, almost 2/3 of GEs revenues came from services: in addition, its stock capitalization increased 40-times during Jack Welch's tenure .
It is commonplace that a large part of the extraordinary success of Apple's business model, together with the speed with which it was achieved is due to Steve Job's genius.Yet, other cases illustrate the role of leadership equally well: IBM experienced Lou Gerstner's and Sam Palmisano's bold chairmanship (and continuity), and GE performed all its transformation during Jack Welch's legendary tenure, while it took less than 10 years to Michael Dell to become world's No. 1 provider of personal computers starting from a garage.These leaders not only gave a seminal contribution in developing innovative business models: they seized the right time to implement them in their organizations, and pushed ahead for years in order to get things done, set the managers' agendas, empower first line and middle managers, and supervise achievements.
However, the case histories also show more gradual transformation, with a less evident role of chairmen's leadership.In the Xerox case 4 different CEOs took charge in the servitization process time frame, and not all of them had a remarkable consistency with the predecessor's strategic goals: as a consequence Xerox servitization process had a more a trial-and-error than rectilinear shape.Moreover, in both Xerox and CAT cases, the impact of servitization was more integrative than transformative (see Section 3), and therefore there was arguably less emphasis on the transformation process momentum.
Another factor that was found to influence the ability to succeed in its servitization process concerns digital technologies.The most appropriate case in point to illustrate how digital technologies supported servitization is Rolls Royce, where aviation engines were equipped with auto-diagnostic and interconnection capabilities, that are at the base of the famous "total care" business model [60].By selling this service to an increasing number of customers, and therefore by collecting an ever increasing amount of field data regarding their aviation engines, eventually Rolls Royce achieved the unique opportunity to develop new and advanced analytics that could support a more accurate and timely decision-making regarding, for instance, the availability of spares at their service centres, or the anticipation of potential failures.By leveraging on these new data-supported methods Rolls Royce was also able to improve customer satisfaction, while at the same time it reduced stocks of engines and spares.Xerox leveraged on the same idea, in order to activate its pay-x-performance scheme, while it resorted to an Internet platform to outsource its customers' printing processes.E-commerce was also Dell's choice in order to dis-intermediate its supply chain and directly sell to final users, without supporting the investment required to set-up a traditional retail network [61].Moreover, by directly managing its final customer relations, Dell achieved customer proximity, and a better understand of customers' expectations, translating it into new products and services.Finally, Apple leveraged the convergence of several technologies within the digital domain in order to provide its customers with new and disrupting functionalities.For instance, the multi-touch technology Apple firstly implemented on its iPhone smartphone in 2007 allowed to get rid of both the mechanical pointer and the physical keyboard, allowing for a much wider display and a more natural user interaction.The role of ICT has not been neglected by the literature, but despite early references to its potential [58] were among the few to advocate the critical role of installed base data and processing and interpretation capabilities, while most studies simply focused on the role of ICT systems to enhance efficiency and the provision of information to customers [62,63].The attention to digital technologies and interconnectedness of products seems to have thoroughly entered the research agenda only very recently [64][65][66][67].
Finally, the ability to master excellent operations turned out to be another enabler of the servitization, in particular for CAT and Dell.CAT built an internal world-class spare parts logistics service, which in turn allowed the company to offer this service to other corporations, thanks to a well-developed physical infrastructure, and to the ability to manage it in an effective and efficient way.This, in turn, led to the establishment of CAT Logistics as an independent company to exploit the newly developed competences in the market of logistic services outsourcing.Conversely, Dell's legacy is more in the finished products' distribution: in fact, an excellent distribution system coupled with an effective manufacturing network allowed to fulfill orders worldwide in just 1 to 2 weeks directly from the factory floor.Despite the fact that, resorting to air and express deliveries, its distribution was overall more costly than its competitors', Dell was able to eliminate obsolescence costs.
Thus, despite confirming the role of the main servitization enablers indicated by literature, our empirical analysis highlights some more factors, of great relevance in determining the success of servitization programs, that are seemingly overlooked by researchers.This is summarized in the following propositions.

1.
Finding 3a: Several servitization enablers pointed out by the literature are confirmed by the case studies, such as the alignment of the organizational structure, the cultural change, the achievement of customer-centricity, the management of the value network, the installed base information management.

2.
Finding 3b: The cases studies point out other enablers that have received little or no attention in the scientific literature: time, leadership and continuity, digital technologies and operational excellence.

Conclusions and Future Research Directions
This paper investigates servitization in manufacturing firms, on three issues debated but yet unresolved in the academic discussion: the servitization pattern, the capability achievement strategy and the servitization enablers.This research draws from two different sources of information: a scientific literature review and a set of famous industrial cases.Literature and practice were found to coincide in several aspects, but also to diverge in some others, in all the three issues considered by our study, as it has been indicated by the seven propositions (Findings) provided at the end of Sections 3-5.Generally speaking, theory was found to cast an oversimplified image of servitization, as compared to reality: however this should be an expected result of almost any theory vs. practice comparison.More remarkably, empirical cases observation highlights some specific discrepancies as compared to theory.
Concerning the servitization pattern, they suggest considering two fundamental dimensions, instead of only one, in describing a servitization process, namely its approach and impact.While theory proposes that a servitization process should in the end yield a complete transformation of the firm, we found several cases illustrating an integrative, rather than transformative effect, in that instead of completely transforming the considered firm's value proposition, they were found to integrate it with new and more servitized offers, but without affecting the more traditional products manufactured by these companies.
Another area in which theory and real-world case histories have some discrepancies is about how companies achieve the capabilities needed to accomplish a servitization process.Case studies pointed out the importance of financial resources to sustain the achievement of capabilities.We found evidence that the availability of important financial resources is especially key when a company resorts to the acquisition of outside companies.The scrutinized cases highlighted three main ways of financing an acquisition process: by selling corporate assets that have become less important in the new servitized scenario; by laying-off large amounts of employees whose competences and capabilities are less relevant in the new scenario; and by leveraging the high cash generation potential of new and more servitized commercial offers.However, case histories supported that finance is a key issue even when a more internal (and thus less capital intensive) trajectory is chosen in order to develop a more servitized offer, since the revenues generated by the new servitized offer could take a period of time in order to pay-back the investments needed in order to develop and spread the new internal capabilities and competences.
Finally, business practices suggested additional exogenous and endogenous enabling conditions to the ones studied in the literature, namely: time, leadership and continuity, digital technologies and operational excellence.In particular, several reasons emerge for the need for a quick and straightforward change and a strong and continuous leadership to promote and achieve it: first, it prevents the dispersion of activities and focuses the efforts of the whole firm, thus increasing the overall commitment; second, internal resistances to a radical change may hamper leadership in the long run; third, it avoids that changes in senior management may alter corporate goals.
This paper, therefore, has shed light on overlooked features, which may be the stepping stone for future research on servitization of manufacturers, given that previous empirical research [13] has found that still today a minority of manufacturing companies has embraced servitization, and that servitizing firms frequently fail to achieve the results that theory would suggest.For this purpose, based on the gaps highlighted with the propositions at the end of Sections 3-5, some directions for future research can be pointed out, labeled RD (Research Directions) in the following.We obtain seven directions for future research.
First, research has only superficially analysed the radical approach to servitization, compared to the linear one.
RD1: Further investigation is required to achieve a greater understanding of the rationale, benefits and risks of the radical approach to servitization.
Second, within the incremental approach, the literature generally posits a linear pattern made of sequential steps that will ultimately lead to a "service-focused" outcome of the company offer.However, reality suggests that it rarely happens this way but rather with trails and errors [68].
RD2: Research should focus on why and how trial and error processes often occur when an incremental approach to servitization is pursued, in order to define whether and how linear and more straightforward patterns can be undertaken in practice, instead of taking them as assumptions.
Further attention should also be given to the fact that development patterns may differ [69], and that the outcome is likely to be the coexistence of different types of offerings and business models [70].
RD3: How companies could effectively manage such complexity is a question of great interest for research and practice alike.
Third, the impact of the servitization process on the servitizing company, either transformational or integrative, described in Section 3, has been found as a relevant dimension to better understand and classify a servitization process.
RD4: Research should investigate the internal impact dimension, and its linkages with the approach (incremental or radical), as well as the role of different capability achievement strategies and servitization enablers in obtaining an integrative vs. transformational impact.
Fourth, we found that different capabilities achievement strategies proved to be effective in supporting the servitization process, consistently with the literature.However, we did not address their linkages with the servitization patterns.
RD5: The study of the linkages between capabilities achievement strategies and the servitization patterns is an area for further research.
In particular, research should focus on the role of the external acquisition of capabilities, as experienced by IBM or GE, and on the role of financial resources (and on the ways to attain them) in shaping the capabilities achievement strategies.
Fifth, our research points to enablers that have not been thoroughly addressed by the servitization research so far: from this finding, two directions for future research can be derived.One concerns a deeper investigation of such enablers' roles and action mechanisms.
RD6: Research should address how enablers such as time, leadership and continuity, digital technologies and operational excellence act in supporting an effective servitization process.
For instance, as digital technologies are becoming more and more central to servitization processes, a greater effort aimed at understanding how they can be effectively deployed is required; at the same time, aspects such as the time frame of the change process and its implications have been rather neglected by the extant literature, and should be taken into consideration.
A further direction suggested by the abovementioned gap is to better frame these enablers, investigating how they are related among them.For instance, the time frame was central to the transformation processes in many of the case histories considered by this study, and was possibly the key driver in the choice of whether and to which an extent to resort to internal or external capabilities, while leadership and continuity were the conditions that allowed the transformation to occur in a rather short time.In addition, since the different enablers do not have the same importance in all the studied case, it would be important to understand under which conditions they become more beneficial or essential to the servitization process (e.g., size and scale).This suggests analysing the link with the servitization pattern, adopting a contingency approach [71].
RD7: The different servitization enablers should be addressed jointly in order to understand how they interact and are linked.Moreover, a contingency perspective should be adopted in order to understand under which (external and internal) conditions the different enablers are beneficial to the different servitization patterns.
Finally, it has to be noted that this paper brings its own limitations, in particular due to the analysis of a small set of case studies, all concerning famous global companies.One major limitation stands in the transferability of findings from global to other companies.As a matter of fact, the challenges facing SMEs in the transition from products to solutions have been rather overlooked by research [43].An empirical research program should be carried out, in order to better investigate small and medium firms, and to find further empirical confirmation of this paper's findings.

Strategy
Move from the offer of a wide range of construction and engineering equipment, to a more integrated offering, encompassing a set of services aside products.

Pattern
Radical: by launching a wide set of service and connected service divisions, CAT underwent a major redefinition of its internal organization and business model.Yet, while the majority of the launched services play a mere supporting role to CAT's core business, the spare parts logistics and remanufacturing departments opened up entirely new markets for Caterpillar.
Especially in spare parts logistics, CAT succeeded in taking advantage of its own internal competences, developed in managing its own assets, to create a service organization operating in a totally different market from its parent company.Forming Cat Logistics, the company set out to expand in the new market of spare parts management, serving companies in several industries ranging from automotive to electronics, including even some of its competitors.Starting from this point, Caterpillar further integrated its logistic service offering with more advanced services such as supply chain management and consultancy and created a network with other major players.
As its spare arts logistics counterparts, also CAT's remanufacturing division started as a captive business, but eventually evolved into an entirely new business, by offering remanufactured parts and groups not only to customer of CAT's machines and engines, but also to users of other brands and alternative products, in the same, as well as other industry sectors, such as: industrial machinery, automotive and electronics.
In time CAT developed a whole set of other services, that it offers only to its own customers, such as: retail and wholesale financing solutions; machinery rental; equipment monitoring; fleet management; automatic and remote machine control; job sites collaborative planning; etc.The physical equipment and support activities needed to operate these services are provided by a network of local mono-brand dealerships, often controlled or owned by CAT.

Capabilities development
In order to establish its spare parts logistics division and services, CAT mainly leveraged on its internal competencies and know-how.The new business units dedicated to the delivery of the aforementioned services were created from green field, and without substantial acquisitions.

Main Enablers
Operational Excellence gained by successfully managing internal business in spares logistics and distribution.This was in turn achieved through a mix of excellent logistics, well-integrated spares supply chain, and the ability to master related data acquisition, storage and analysis.Technology: CAT machines are redesigned and endowed with advanced auto-diagnostic systems, coupled with an on-board computer and a data transmission system.As soon as a part brakes down, the diagnostic system can identify it and by means of the on-board computer, by leveraging the above-mentioned operational excellence, the corresponding spare can be located within CAT's network, and ordered.Leadership: although the relevance of Jim Owens' chairmanship was far from being as decisive as Jack Welch's, his ability to set strategic goals, and steer the company to achieve them was noteworthy.

Main facts
1987: CAT Logistics is established 2002-2003: All CAT machines come fitted with advanced auto-diagnostic systems, coupled with a computer and a transmission system 2004: Jim Owens mandate as CAT's Chairman and CEO begins 2010: D. R. Oberhelman succeeds Owens as CAT's CEO and Chairman 2013: establishment of the Caterpillar Enterprise & Systems Group, an internal initiative shaped to standardize and steer the order-to-cash process through the whole group Main references [77][78][79][80][81] Table A3.Dell computers.

Strategy
Disintermediate the traditional personal computers' delivery chain by avoiding to resort to a network of dealers, and instead preferring to bear the direct contact with the end customer, and to assemble the computers on customers' request.In turn this shift is habilitated by an e-commerce internet platform, directly created and operated by Dell.

Pattern
Despite the fact that Dell itself did not embark on a transformation process, but rather it was directly invented in its innovative form, it introduced a profound discontinuity from the traditional way PCs were produced and distributed.By taking over activities related to product customization, Dell embedded itself into the IT operations of its enterprise customers and, at the same time, it created additional revenues from services.For example, Dell was the first to provide not only computers, but also services related to hardware and software image development, migration and recovery, custom configuration and installation of software or parts replacement.This was achieved by adopting an innovative on-line-only distribution channel, connecting consumers directly to the company.In this case, therefore, servitization is achieved by a direct customer contact and supported by a peculiar and highly flexible operations strategy.

Capabilities development
In a first phase, from company's foundation to approximately 2005, the deployment of Michael Dell's bright strategic intuition to build on the internet in order to overcome retailers and directly connect with final customers was pursued internally by developing required capabilities and competencies within Dell Inc.This trajectory was very successful until Dell's lean supply chain was able to yield a large cost and price advantage as compared to competitors.Yet, by the middle of the new century's first decade, this advantage had been eroded partially because competitors had catch-up, and partially because the newly developed smartphones were attracting an increasing amount of interest, and volumes, from the market, progressively relegating laptops to a less attractive and less lucrative commoditized role.As a consequence, Dell quickly expanded its PC manufacturing business into corporate computer services, by purchasing leader companies in such segments as gaming consoles, IT consulting, or data storage systems.

Main Enablers
Operational Excellence was the main driver of Dell's success through the 80's and 90s, especially in manufacturing, logistics and supply chain management.Dell's supply chain was so leaner than competitor's that by 2002 operating costs were just 10% of Dell's revenues, as compared to 20% at HP. Leadership: although Michael Dell played more the role of founder and entrepreneur, than that of boss, and despite the fact that he appointed Morton Meyerson, Lee Walker and Kevin Rollins as Dell's CEOs, his flamboyant personality played a major role in determining his company's fortunes, by conceiving the business idea that enforced Dell's success from 1984 to 2004, relentlessly pushing to scale up sales volumes, and personally supervising the excellence with which his strategy was executed throughout Dell's supply chain.Technology: as soon as the internet e-business technology was mature enough, Dell was able and quick to smartly leverage it in order to scale-up its direct sale business model, gaining a direct access to direct customer relations that competitor were dreaming of, and making a wise usage of the enormous amount of data that this novel business platform could generate.

Strategy
Shift from manufacturing to services, as well as from product to solutions.GE scale was leveraged to start a new business in financial services (the well-known GE Capital BU), firstly dedicated to the captive market, and then turned inward out.Launch of integrated product-service offer in many product divisions, such as aviation, engine, healthcare.Redefinition of GE's positioning within the interested industries, by applying the principle that GE should either attain No. 1 or 2 position in each industry or completely leave the considered sector.

Pattern
Thanks to the vastly recognized ability of Jack Welch to steer the turnaround process, the company underwent several organizational changes.Welch worked wonders in reshaping GE's organization by dismantling the previously dominant internal bureaucracy and halving the number of hierarchical layers.Moreover, Welch was a fierce supporter of results-driven selection of managers, firing year after year the worse performing 10% and rewarding with a vast stock option scheme the best performing 20%.
One key idea was to form a "services council", where representatives from all its manufacturing businesses shared tips on how to expand the services business.

Capabilities development
Within GE Capital, GE could expand its service portfolio along different directions through massive acquisitions campaigns that allowed it to move horizontally to entirely new industries such as media, wind power and entertainment (with NBC acquisition).More than 600 acquisitions were made worldwide, following this plan.In order to make cash for the bold acquisition plan, Welch closed or sold the worst performing or less promising businesses (such as GE information systems), and fired around 81,000 people within continuing businesses.Meanwhile, the company undertook internal vertical transformation of the organization to promote the best performing managers and to provide product and service bundling solutions in each segment where it operated.

Main Enablers
The most evident enabler of GE's turnaround was the leadership expressed by its legendary chairman and CEO Jack Welch.He relentlessly, reduced inventories, established GE as a business leader in any sector in which it operated and shifted GE from a large domestic player to a worldwide giant.
Another key element in determining GE's servitization turnaround success was its scale: in fact it would have been almost impossible to be successful in such a program for any company not having its vast dimension.It has to be underlined also that by leveraging on Jack Welch undisputed leadership, and GE scale, it was possible to achieve a radical turnaround, together with tremendous financial success in a strikingly short time frame.Finally, operational excellence was leveraged as a key internal asset in optimizing GE's management, especially of of logistics and quality Table A5.IBM.

Strategy
Switch from the traditional mission embedded in the corporate name ("Industrial Business Machines") to apply IBM's proprietary complex technologies and broad base of vertically-integrated technological capabilities, in order to solve directly business challenges and provide customers with complete integrated solutions.
The new corporate mantra is to support worldwide "business decision making".

Pattern
Transformational approach, applied to almost any relevant corporate aspect.Almost anything has been radically changed, from strategy to operations, from people to core markets.More specifically, IBM has pulled out of the consumer computers and peripherals markets, and has strengthened its position within the software and consulting markets.Notably, the turnaround happened in two specific phases: first, mainly under Gerstner's tenure, a major switch was accomplished from the design, manufacture and sale of computers and peripherals, to consulting services: this phase started with the sale of Lexmark in 1992 and culminated with the purchase of PwC in 2002.then, more under Palmisano's chairmanship, the corporate focus was re-directed from management consulting to highly specialized and high-tech software, Strong emphasis on the time frame: the whole turnaround happened in just 10 years, involving almost any of its around 200,000 employees.

Capabilities development
The turnaround was accomplished in two phases: In an early stage, mainly internal competences were used, by cherry-picking throughout the organization people with valuable knowledge and empowering them to fully diffuse their know-how.Meantime, a large amount of employees whose skills and competences were not aligned with IBM's new business goals where laid-off.This phase culminated with the two famous jam programs of 2003 and 2004.Then, in 2005 a strong campaign of acquisitions was launched, in order to rapidly achieve a dominant position in the business software.Simultaneously the PC business was spun-off, in order to provide cash for supporting the acquisition program.Since then, more than 100 large, and many more small, sw companies were purchased.

Main Enablers
The most evident enabler of IBM's turnaround was the leadership of its chairmen, given the high impact of Gerstner's and Palmisano's tenure.Both shared a common vision, seized the right moment to affirm it, and were able to safely steer the transformation process through turbulent times.Remarkable was also the continuity between the two CEOs on strategic goals and implementation.
A second relevant issue was also IBM's ability to keep the process in track and perform an impressive and radical turnaround in a remarkably short time frame.

Strategy
Focus on increasing revenues from after-sales services, in order to counter a drop in aero engines sales and margins, owning to increased competition with GE and Pratt & Whitney.
Offer "TotalCare©" innovative business model whose pricing is connected to customers 'processes' performances rather than to the activities and materials actually employed to technically upkeep products

Pattern
Incremental: the introduction of the new servitized business model was achieved in steps.
-First, a "power by the hour" scheme was issued, providing the airline operators with a fixed engine maintenance cost per hour of flight over an extended period of time.Thus, airlines were assured of an accurate cost projection and could avoid the costs and risks associated with unscheduled maintenance operations.-Subsequently, the TotalCare© scheme was introduced on top of "power by the hour", as RR's flagship brand for civil aerospace engines, by equipping engines with advanced auto-diagnostic and interconnection functionalities.
Total Care provides customers with an opportunity which is an alternative to conventional ways of doing business in this sector, and offers a wide range of core and optional services that airlines can choose to activate or not, such as: engine repair and overhaul; reliability improvements; health monitoring; repair shops operations; technical records management; spare parts and spare engines service; engine transportation; etc.

Capabilities development
Mainly internal competencies and know-how were leveraged to fit RR's engines with auto-diagnostic and interconnection capabilities, able to support the Total Care business model.Despite rethinking its engines and equipping them with self-monitoring and interconnection capabilities, RR set-up a 14 engines and repair centres and 25 component repair centres worldwide.RR established Control and data Services (CDS) as its business unit devoted to build, install and operate the specialized equipment needed to support its Total Care business model, as well as the unit that captures, manages and analyses the technical data collected in field.

Main Enablers
-Technology: by means of a complex set of sensors the functioning of main components and groups is monitored in real time, and a transmission unit is employed to feed back relevant data each minute to a control centre.-Operational Excellence: by leveraging on data coming from more than 3,000 engines in operation, and elaborating them with sound analytics, RR has developed world-class competences in complex systems reliability improvement and preventive maintenance.

Table 1 .
Temporal distribution of the selected literature.

Table 2 .
Distribution across journals of the selected literature.

Table 3 .
Summary of the main evidences from the business cases considered.

Table 5 .
Capabilities achievement by the case companies.