Towards systematic sustainable business model innovation: what can we learn from business model innovation

: This research aims to understand how sustainable business model innovation (SBMI) can learn from business model innovation. For this, first, we conducted a bibliometric analysis to evaluate the relationships between business model innovation and SBMI literature. After this, we performed a systematic literature review to create a comprehensive framework for managing SBMI. The bibliometric analysis showed that the SBMI stream grew quickly and significantly in recent years, evolving into a separated new research stream, which does not leverage recent business model innovation advancements. Through the performed analyses, we were able to discuss critical gaps in the SBMI literature and shed light on possible pathways to solve these gaps through lessons learned from business model innovation. We depicted five critical gaps for managing SBMI; (1) the need to understand the sustainable business model as a wicked problem, in which SBMI leads to “better than before” solutions calling for systematic SBMI, (2) the poor definition of distinctive dimensions of dynamic capabilities for SBMI, (3) the lack of studies exploring the role of open innovation for improving the SBMI process, (4) the lack of tools supporting SBMI implementation and (5) the need to explore game-changing, competitive advantages of SBMI. The findings of this study contribute to guiding future research on SBMI, which can be a basis for further efforts towards sustainable development.


Introduction
The 26th UN Climate Change conference in Glasgow, Scotland, reinforced the need for companies' commitment to sustainable development [1,2]. In this context, the conference highlighted the need to transform different industries' business models for sustainability [3,4]. A business model for sustainability, also known as a sustainable business model (SBM), represents how a company creates, delivers, and captures value while generating positive effects and/or reducing negative impacts on the environment and society [5].
There are some exciting examples of startups developing new SBMs. Bureo, a Chilean startup [6], creates value from its discarded fishing nets' palletizing process. From this material, the startup manufactures and markets skateboards, delivering and capturing value. Their business model reduces negative environmental effects by preventing harmful materials from contaminating the ocean. At the same time, Bureo generates a positive social impact as the model supports local fishing communities through financial incentives [7]. seizing, and transforming needed to execute the SBMI process. It aligns with the most recent BMI advancement; however, studies only mention and do not explore further the potential dynamic capabilities for SBMI, and there is a clear lack of studies exploring the role of open innovation for SBMI. The final research stream is the most explored and provides several tools, methods, activities, and practices while defining the SBMI process. However, these are much more related to identifying opportunities and designing SBMs than transforming and escalating.
This study is structured as follows. The following section presents the theoretical background, exploring underpinning concepts and clarifying our research background better. In Section 3, we present the adopted method. We show our core findings in Section 4. We then discuss the findings and main research gaps for SBMI management in Section 5. Finally, we conclude this study in Section 6.

Sustainable Companies and Sustainable Business Models
The literature points out several aspects relating to companies and sustainability. A sustainable company creates benefits for all stakeholders while acting in the preservation of the environment and contributing to people's lives [28]. Based on this definition and considering the abovementioned SBM definition, we can affirm that sustainable companies need an SBM. For example, it is not enough for a sustainable company to deliver a new ecofriendly product (as a value to its customers). If its value creation processes, i.e., how the company develops and distributes this product, harm the environment, how can it be considered sustainable? If the value capture, i.e., how the company obtains returns on the delivered product, causes negative social impacts, such as encouraging excessive consumerism [29], how can it be considered sustainable?
Thus, a company's sustainability does not mean the condition of lasting over time without considering its surrounding context and the ecosystem in which it operates. Companies and their business model are part of a system, and changes in one dimension of sustainability will necessarily impact others [30]. For this reason, sustainable enterprises are often related to the concept of sustainable development [31], conceptualized as: "development that meets the needs of the present without compromising the ability of future generations to meet their own needs" [32]. Sustainable development, therefore, usually involves tensions between social, ecological, and economic objectives [33]. These dimensions characterize the framework called the triple bottom line.
Thus, sustainable development is a process of change in which the exploitation of resources, decisions on investments, the orientation of technological development, and institutional transformations must be in harmony to enhance human needs and aspirations in the present and future [32]. Meeting the triple bottom line is a process of change in search of balance, so is part of SBMI processes.
When companies fail in this process of change, their activities can generate negative impacts on society and the environment [34]. The hard truth is that many companies have failed. From responding to the effects of climate change [35] up to the incorporation of circular economy principles into their strategies [36], integrating sustainability has not been a trivial task. According to Molina-Castillo et al. [37], the logical foundation for sustainable companies lies in the value proposition and the capability for innovation. However, it is necessary to understand how the company's value proposition is being created, delivered, and captured for the dimensions of sustainability.
Natura, a Brazilian cosmetics company, is an excellent example of how to develop innovative SBM. The company delivers high-quality cosmetics as a value to its consumers, competing with other significant players such as L'Oreal, P&G, and Unilever. However, its value creation process differs by promoting Amazonia's Forest preservation while also contributing to the local families' development. For example, in some of its products, the company uses uccuba tree seeds. Local communities used to cut down these trees to produce wooden goods. These communities earn more advantageous revenues now, supplying uccuba seeds to Natura and avoiding millions of miles of deforestation. In addition, in its value capture process, i.e., in the sale of cosmetics, Natura reverts part of its revenues to the communities to promote ecosystem preservation projects. For example, local wildlife conservation projects [38].
Natura's SBM covers all dimensions of the triple bottom line, characterizing it as a fully sustainable company. Full sustainability entices total accomplishment of economic, social, and environmental value creation [39]. If any dimension is not fully addressed, then it is not fully sustainable. It is possible to be economically feasible while also protecting the environment. However, without social value creation, it is still not fully sustainable. This combination is called ecological, given the potential protection of the Earth's longterm health combined with economic feasibility, a must in a capitalist society [40,41]. Considering the example of Natura, it is not surprising that SBMI has been observed as a lever for changing a system to achieve sustainability [41].

What Can We Learn from Other SBM and SBMI Reviews?
The power of BMI to transform from enterprise systems to the logic of entire industries is well described in the literature. The growing academic interest in the subject has been notorious in the last 20 years [42]. Today, besides better conceptual understanding, it is also possible to find applied studies and branches that explore BMI for specific functions. Since the mid-2010s, the sustainability branch has attracted the interest of researchers. The graph shown in Figure 1 reveals search results for the terms "Business Model Innovation", "Sustainable Business Model", and "Sustainable Business Model Innovation" using the Web of Science database. For better visualization, we used a logarithmic scale (base 2). Natura, a Brazilian cosmetics company, is an excellent example of how to dev innovative SBM. The company delivers high-quality cosmetics as a value to its consum competing with other significant players such as L'Oreal, P&G, and Unilever. Howe its value creation process differs by promoting Amazonia's Forest preservation while contributing to the local familiesʹ development. For example, in some of its products company uses uccuba tree seeds. Local communities used to cut down these tree produce wooden goods. These communities earn more advantageous revenues n supplying uccuba seeds to Natura and avoiding millions of miles of deforestation addition, in its value capture process, i.e., in the sale of cosmetics, Natura reverts pa its revenues to the communities to promote ecosystem preservation projects. For exam local wildlife conservation projects [38].
Naturaʹs SBM covers all dimensions of the triple bottom line, characterizing it fully sustainable company. Full sustainability entices total accomplishment of econo social, and environmental value creation [39]. If any dimension is not fully addres then it is not fully sustainable. It is possible to be economically feasible while protecting the environment. However, without social value creation, it is still not sustainable. This combination is called ecological, given the potential protection o Earth's long-term health combined with economic feasibility, a must in a capitalist soc [40,41]. Considering the example of Natura, it is not surprising that SBMI has b observed as a lever for changing a system to achieve sustainability [41].

What Can We Learn from Other SBM and SBMI Reviews?
The power of BMI to transform from enterprise systems to the logic of e industries is well described in the literature. The growing academic interest in the su has been notorious in the last 20 years [42]. Today, besides better concep understanding, it is also possible to find applied studies and branches that explore for specific functions. Since the mid-2010s, the sustainability branch has attracted interest of researchers. The graph shown in Figure 1 reveals search results for the te "Business Model Innovation", "Sustainable Business Model", and "Sustainable Busi Model Innovation" using the Web of Science database. For better visualization, we u a logarithmic scale (base 2).  The relationship between SBM and SBMI macroconstructs deserves specific attention. Foss and Saebi [42] evidence how the business model concept evolved long before the first studies on its innovations. That same logic does not seem so clear to SBM and SBMI. The literature seems to be developing the concept of SBM while seeking to explore innovations that make business models sustainable. To understand how these macroconstructs are developing, we analyze all the literature reviews found on both topics in the Web of Science. Table 1 compiles relevant information about these revisions. Reviews regarding SBM have a closer relationship to conceptual construction and the definition of its elements. Bocken et al. [40] categorize and develop SBM archetypes. Nosrabatadi et al. [43] present 14 categories of SBM, besides pointing to taxonomies regarding the theme. Goni et al. [44] reveal a framework with SBM key features, considering nine main aspects for this type of construct. These studies, however, were not oblivious to innovation, bringing contributions also to SBMI.
SBMI-specific reviews were also not limited to addressing innovation. Geissdoerfer et al. [19], for example, reviewed the main concepts of SBM and attempted to differentiate and relate "Business Models"; "Sustainable Business Models" and "Circular Business Models" before advancing in SBMI literature. Such analysis reinforces that the construction of these concepts is developing concomitantly.
However, all studies in Table 1 report the need for greater clarity on processes related to SBMI. Sinkovics et al. [46] highlight the need to identify the conditions that promote SBMI design and implementation. For Shakeel et al. [20], SBMI needs further studies that explore its implementation and experimentation in different contexts. Geissdoerfer et al. [19] question how organizations can transform BMs to SBMs in practice. The authors also specify that it would be essential to point out the phases, activities, and challenges of this process. Barth et al. [45] report the need to delve into the concept of "value intention", which relates to the mindset of decision-makers regarding attitudes to change and innovation.
All these issues converge to highlight the need for solutions to systematize SBMI. That is, solutions that enable managing processes, tools, antecedents, and resources for (continuous) new SBM creation or transformation. The importance of a systematic approach to SBMI so that the search for new SBMs becomes a capability and not an end in itself, allowing companies to become more sustainable by exploring new business models systematically. Interestingly, the BMI literature seems little explored in this regard. It is not clear if SBMI literature relies on BMI management knowledge. That is, does SBMI build on the most recent advancements of BMI research?

Systematic Business Model Innovation
The event known as the dot-com bubble was a milestone for business model studies [47]. The postcrisis brought the success of startups, and new business models stood out, displacing old ones. The interest of scholars and managers on this topic grew considerably, and BMI gained momentum [42]. Despite relevant theoretical contributions, it was discussed why most attempts to implement BMI was failing [48]. Given its importance, BMI should not be something random. Instead, companies needed to lead BMI activities through BMI processes, or, in other words, manage BMI [49].
The BMI field is still answering to this reality by moving from conceptualizing BMI towards systematic BMI, learning, for instance, from innovation management [27]. Thus, literature started to explore BMI antecedents, tools, and processes, in the efforts towards proposing a business creation engine-a never-ending approach to uncover and create new business models [15]. Hence, many novel BMI studies target such an organizational phenomenon and offer approaches regarding experimentation [50], ambidexterity [51], open innovation [52,53], dynamic capabilities [15], and organizational design [54].
It is important to note that systematic BMI is still in development. What we argue, however, is that its process is more advanced, and lessons can be learned and considered in further advancements of SBMI literature. Sustainability aspects will obviously bring further layers of complexity to systematization of the innovation process. While BMI focuses on the economic aspect, SBMI needs to balance social and environmental aspects. In this regard, it will be essential to understand how the SBMI literature presents this balance between the triple-bottom-line dimensions. That is, what types of sustainable-oriented BMI can be found in the literature?
In addition, sustainability should be understood as a continuous process, which varies according to needs and contexts, and not as a fixed goal [55,56]. Understanding sustainability systematically reinforces the need to move forward in search of a sustainable business creation engine. Thus, it seems pertinent to explore in the literature how companies are managing SBMI. That is, what antecedents, tools, and processes are related to SBMI?

Method
To develop our method, we combined bibliometric analysis and SLR. Through the bibliometric analysis, we intend to understand if SBMI and BMI research fields are evolving together (i.e., one seizes the other advancements), in parallel and separated (i.e., they both develop, but has few dialogs), or one substitutes the other (i.e., SBMI replaces BMI). Our objective is understanding whether SBMI builds on the most recent BMI advancements. With the SLR, the goal is to understand and organize the SBMI literature into an integrative framework for systematically conducting SBMI. The aim is to discover (1) what the types of sustainable-oriented BMI are, (2) what the antecedents are, and (3) what the tools and processes related to SBMI are. Combining such approaches minimizes findings' misinterpretation. Additionally, it enhances the value of the literature review [57,58].

Bibliometric Analysis
A bibliometric analysis allows a deep understanding of the relationship between articles, citations, co-citations, and keywords. Thus, results can provide relevant information about a research field through a reliable analysis of hundreds of articles. Finally, bibliometric results are usually visual-oriented, providing better comprehension for readers [58]. The first step of the bibliometric analysis was to collect the documents in the Web of Science and Scopus databases. To this end, we used the general query containing only the term "Business Model Innovation" in the title, abstract, or keywords. This decision was made considering it provides results for any string that combines something with business model innovation, i.e., "sustainable business model innovation", "Business model innovation for sustainability", "circular business model innovation", and so on. Hence, the search would provide us a clear vision of the whole BMI field and subfields for the bibliometric analysis, allowing us to investigate the relationship between SBMI and BMI literature.
We conducted the search in September 2021, and we found 1968 documents analyzed with VOSviewer ® . We highlight that before processing the content in the software, we grouped similar terms (e.g., sustainable business model + SBM) and removed words that did not present any conceptual contribution (e.g., chapter, issue, researcher, etc.). These adjustments were performed through Thesaurus, as recommended by van Eck and Waltman [59].
We performed bibliographic coupling analysis to relate BMI and SBMI. The aim was to generate visualizations of document and publication sources clusters. We defined the threshold of 15 citations for inclusion in the clustering. We also considered a minimum of 25 items per cluster. We determined the number of citations and the number of items per cluster based on similarity analysis between clusters.

Systematic Literature Review
SLR provides a thorough analysis clarifying contextual relationships, aiming to identify, specify, map, and evaluate the literature in a systematic, objective, and replicable way. Their results refer to a given knowledge field's state of the art [60]. In the following subsections, we present the steps conducted in this SLR [61,62]. We followed Denyer and Tranfield's [60] guidelines, which is an approach used in other studies [61,62].

Step 1-Research Questions
According to the mentioned guidelines, the first step is to formulate the research questions that will determine the scope of the analysis. Based on the context presented in the theoretical background, we define three guiding questions for the SLR: (1) How does the literature present the SBMI outcomes? (2) What firm-level antecedents can be associated with SBMI? Additionally, (3) what design tools and processes are associated with SBMI?

Step 2-Search Procedures
In the second step, we established the search procedures. As our research goal is to investigate the SBMI literature, and we used the following search query: ("sustain* business model* innov*" OR "business model* innov* for sustain*" OR "sustain* oriented business model* innov*" OR "sustain*-oriented business model* innov*" OR "sustain* innov* of business model*" OR "sustain* innov* in business model*" OR "business model* innov* toward* sustain*"), in Scopus (title, abstract and/or keywords) and Web of Science (topic). The search was conducted on November 28 2021.

Step 3-Selection and Evaluation
In this step, we used the PRISMA flowchart [63] (Figure 2) to guide the selection and evaluation step. innov* of business model*ʺ OR ʺsustain* innov* in business model*ʺ OR ʺbusiness m innov* toward* sustain*ʺ), in Scopus (title, abstract and/or keywords) and Web of Sc (topic). The search was conducted on November 28 2021.

Step 3-Selection and Evaluation
In this step, we used the PRISMA flowchart [63] (Figure 2) to guide the selection evaluation step.

Step 4-Analysis and Synthesis
In the fourth step, to perform the analysis and synthesis phase, we followed the recommendations of Elo and Kÿngas [64], which are described here to ensure the research reliability. At the beginning of this phase (organizing phase), the authors needed to define the approach to be used. The content analysis can be inductive or deductive. In this research, we used an inductive approach due to the lack of previous structures to be used in classification. We first analyzed the articles from the sample to develop an open coding of their content. We then created coding sheets through an analysis of texts' content. This analysis confirmed our proposition of major classification groups of SBMI types and outcomes, firm-level antecedents, and process and supporting tools, methods, activities, and practices. We then moved forward to create subcategories for each of the three major groups, further refining our codification.
The categorization matrix was developed using these coding sheets and the sample articles allocated in this matrix according to their classification. We allowed some publications in more than one category since some publications contribute to several categories. After the classification, it was necessary to conduct the abstraction of the content through an in-depth analysis of the sample publications to establish an overview of the current literature on SBMI. All classifications and results were qualitatively accessed and thoroughly discussed by the authors, involving synthesizing multiple opinions to enrich the quality of the result.

Step 5-Report and Conclusions
The results present answers to the SLR questions. The discussion of the results, however, raised additional questions. Thus, we identify what we believe are critical gaps regarding SBMI management literature, critically accounting and comparing with recent advancements in the BMI literature.

Results
In this section, we show our systematic literature review results. We first draw on a bibliometric analysis of the business model innovation literature using VOSViewer© to evaluate the SBMI field evolution and its connection to BMI research. In sequence, we present the in-depth bibliographic review, considering 40 SBMI research papers. We introduce the main research streams regarding the SBMI management concept.

Bibliometric Analysis
A comparative analysis with VOSviewer ® shows a clear and significant separation between SBMI and BMI. From Figure 3, we notice a clear separation between the red cluster, which represents the SBMI authors around Bocken et al. [40], and the blue, green, and yellow clusters of BMI authors, such as Foss and Saebi [42], Sosna et al. [50], and Chesbrough [65]. We also notice that the yellow, green and blue clusters share many connections, are closer to each other, and are intertwined.  The overlay distribution of the studies shows that the SBMI field is more recent than the mainstream BMI ( Figure 4). Nevertheless, it also indicates that all four streams are advancing in parallel. New studies are emerging in all four clusters, showing that, in line with Lüdeke-Freund's [66] observation, SBMI is emerging as a new research field rather than substituting mainstream BMI. The overlay distribution of the studies shows that the SBMI field is more recent than the mainstream BMI ( Figure 4). Nevertheless, it also indicates that all four streams are advancing in parallel. New studies are emerging in all four clusters, showing that, in line with Lüdeke-Freund's [66] observation, SBMI is emerging as a new research field rather than substituting mainstream BMI.
innovation.". The overlay distribution of the studies shows that the SBMI field is more recent than the mainstream BMI ( Figure 4). Nevertheless, it also indicates that all four streams are advancing in parallel. New studies are emerging in all four clusters, showing that, in line with Lüdeke-Freund's [66] observation, SBMI is emerging as a new research field rather than substituting mainstream BMI.  SBMI is close but separated from the service business model innovation, the yellow cluster ( Figure 3), which is interesting considering the literature highlights the potential positive impacts of servitization and product-service systems in sustainability [39,67]. Tables 2 and 3 show the most-cited publications for SBMI and BMI, which supports the interpretation of the VOSViewer ® analysis from the BMI field. Table 2. Most-cited publications in the SBMI field. Source: Scopus, 10/10/2021.

Authors Cited by
Chesbrough H. [65] 1632 Johnson M.W., Christensen C.M., Kagermann H. [71] 1179 Chesbrough H. [72] 689 Yunus M., Moingeon B., Lehmann-Ortega L. [73] 597 Foss N.J., Saebi T. [42] 576 Sosna M., Trevinyo-Rodríguez R.N., Velamuri S.R. [50] 507 Considering the publication sources, SBMI is majorly published in engineering and special purpose journals, with only a few published in business and management journals. On the other hand, BMI is more distributed. Although primarily published in business and management journals, it is also published in engineering and special purpose journals. Tables 4 and 5 depict, respectively, the demography of journals publishing BMI and SBMI.  Analyzing with the VOSviewer ® , targeting the journals citation relationship through bibliographic coupling (the degree of sharing the same references), we notice the blue cluster, publishing more SBMI, centralized in the Journal of Cleaner Production and Sustainability (Switzerland). Journals oriented towards sustainability appear jointly in this cluster. The red and green clusters are closely related to one another and are slightly separated from the blue cluster. These are mostly publishing mainstream BMI ( Figure 5). Analyzing with the VOSviewer®, targeting the journals citation relationship through bibliographic coupling (the degree of sharing the same references), we notice the blue cluster, publishing more SBMI, centralized in the Journal of Cleaner Production and Sustainability (Switzerland). Journals oriented towards sustainability appear jointly in this cluster. The red and green clusters are closely related to one another and are slightly separated from the blue cluster. These are mostly publishing mainstream BMI ( Figure 5 Taking a closer look into the overlay function ( Figure 6), we can see more recen action on journals from the blue cluster ( Figure 5) (SBMI and sustainability-oriented BMI Taking a closer look into the overlay function ( Figure 6), we can see more recent action on journals from the blue cluster ( Figure 5) (SBMI and sustainability-oriented BMI) and green cluster (general management and engineering journals). The red cluster ( Figure 5), which also holds entrepreneurship journals and proceeding conferences, seems to have less action. This is in line with the idea of BMI evolution to BMI management, emphasizing new ventures, capabilities for continual execution of BMI, and the rise of sustainability and digital transformation phenomena. To deepen our analysis of each field's evolution, we analyzed the keywords ( Figure  7). It is possible to identify five clusters. The red comprises terms related to sustainability, sustainable development, SBM, and SBMI. The blue cluster contains performance aspects, dynamic capabilities, BMI, etc. Finally, the purple cluster presents the terms startup, entrepreneur, competitive advantage, etc. The green and yellow ones are those close to each other, showing terms related to BM, digitalization, technologies related to digital transformation, service and service innovation. To deepen our analysis of each field's evolution, we analyzed the keywords (Figure 7). It is possible to identify five clusters. The red comprises terms related to sustainability, sustainable development, SBM, and SBMI. The blue cluster contains performance aspects, dynamic capabilities, BMI, etc. Finally, the purple cluster presents the terms startup, entrepreneur, competitive advantage, etc. The green and yellow ones are those close to each other, showing terms related to BM, digitalization, technologies related to digital transformation, service and service innovation.
When considering these keywords, regarding the period in which they were published, through the overlay function (Figure 8), it is possible to verify that we can highlight SBMI, dynamic capability, digitalization, circular economy, and startup among the most recent keywords. Among the oldest terms, we emphasize business model, firm performance, competitive advantage, and technology, which shows that these topics have been debated for a longer time. Combining both analyses, we notice that the BMI literature is moving towards further researching dynamic capabilities and capabilities for continual BMI in general, exploring the digital transformation phenomenon and understanding the relationship between incumbents and small and medium enterprises (SME) and startups. SBMI, in contrast, is more concerned with tools, experimentation, and design. When considering these keywords, regarding the period in which they were published, through the overlay function (Figure 8), it is possible to verify that we can highlight SBMI, dynamic capability, digitalization, circular economy, and startup among the most recent keywords. Among the oldest terms, we emphasize business model, firm performance, competitive advantage, and technology, which shows that these topics have been debated for a longer time. Combining both analyses, we notice that the BMI literature is moving towards further researching dynamic capabilities and capabilities for continual BMI in general, exploring the digital transformation phenomenon and understanding the relationship between incumbents and small and medium enterprises (SME) and startups. SBMI, in contrast, is more concerned with tools, experimentation, and design. To better understand the SBMI field's evolution, we move forward into taking a deep dive inside this literature through the SLR, opening up and making sense of the bibliometric analysis. Thus, we are understanding how to integrate existing literature into a comprehensive framework, taking the first steps towards systematic SBMI. To better understand the SBMI field's evolution, we move forward into taking a deep dive inside this literature through the SLR, opening up and making sense of the bibliometric analysis. Thus, we are understanding how to integrate existing literature into a comprehensive framework, taking the first steps towards systematic SBMI.

Systematic Literature Review
We organized the reviewed papers according to types of sustainability-oriented BMI. The SBMI literature presents several studies that do not cover all triple-bottom-line layers. Some studies focus on providing models that promote balance between the environmental and economic dimensions, which we classified as ecological BMI. Other studies focus on models that balance the social and economic dimensions, which we classified as equitable BMI. Studies that exclusively balance environmental and social dimensions, which would be classified as altruistic BMI, were not found, which makes sense because to be an innovation it needs to have market acceptance, and therefore, a solid economic pillar. Finally, we classified studies that comprise all dimensions of the triple bottom line as SBMI. Table 6 presents the type of sustainable-oriented BMI based on publications that support the performed categorization. Finally, we connected such categorization and SBMI literature with sustainable development goals (SDG). The intent was to provide a broader view of how SBMI studies are contributing to these goals. "The BC has a positive influence on the society because data entries are digital and immutable. Information about quality (e.g., geographic origins and freshness), safety (e.g., healthiness and no modification) and sustainability (e.g., fair-trade) of the products are guaranteed by the BC, which ensures data transparency, integrity and security."   "These CE actions (furniture, mugs and food containers, appliances and lighting) have been considered a key starting point to help overcome organisational and operational barriers (Table 1) and redesign the university's business model

Type of Sustainable Oriented BMI SDG Supporting Publications
Sustainable BMI: Social, Environmental and Economic 1,7,8,9,11,12,14 "Econyl is a polyamide made from 100% recycled raw materials that include postconsumer waste such as fishing nets carpets, clothing, rugs and rigid textiles, as well as preconsumer waste such as oligomers, scraps and others generated from the production of Nylon 6" [ . . . ] "The main source of regenerated nylon is made of fishing nets recovered in the seas, oceans and aquaculture" [ . . . ] "To date, the company's turnover coming from circular economy had grown by 6.5%" "[ . This literature organization process revealed an important research stream based on SBMI outcomes. This research stream provides (and analyzes) pictures of new SBMs, targeting what specific elements changed and the impacts on society, environment, and profit. It usually relies on case studies and either focus on a solution (social purpose or environmental purpose) or a technology (Blockchain, IoT, etc) [74,77,86]. The key idea is to show interlinks between generating economic value and social and/or environmental value [67,68,87], delivering value for multiple stakeholders [76,85]. The literature often uses a BM visual tool to describe these new BMs, such as the Triple Layered Canvas and BM Canvas [74,77], and archetypes [41,88].
The emphasis is usually on showing environmental and social value. Although mentioning economic value, it is in a second plane and accompanies the BM logic. Notable studies targeting the economic issue tend to look more carefully into customers' willingness to adopt new sustainable-oriented BMs, such as Yip and Bocken [41] in the banking sector, and Sattari et al. [89] who studied Circular Business Models. Short et al. [76] attempt to uncover this issue by evaluating value-creating complementarities between environmentally friendly BMI and economic gains.
Evaluating SBMI outcomes and showing potential means to create complementarities between triple-bottom-line sustainable dimensions is in line with the most recent research on BMI. Accordingly, it is acknowledged that a BM's core element is the creation of virtuous value cycles, building complementarities that add value [15]. When translating this idea to the SBMI reality, it is vital to develop such complementarities between all three dimensions, adding value for multiple stakeholders, including society and the environment [85].
Despite this research stream's importance, if we consider SBMI management, it is essential to explore other elements. In the following subsections, we examine antecedents, tools, and processes regarding managing SBMI.

SBMI Firm-Level Antecedents
This is an emerging research stream and has few papers exploring it. Instead of focusing on the components of newly developed SBM and on specific tools to help the process, this research stream targets organizational phenomena that effectively lead to SBMI. Hence, the focus is on how organizational design [9] and structure [90], along with strategy [9,75,90] and operational configuration (mainly leveraging startups founders) [91], shape the organization's capability for continual deployment of SBMI [14]. The stream also provides the relevant capabilities for SBMI. Some examples are legitimizing activities with stakeholders [10,92]; influencing supply-chain leaders to create adequate supply networks for embracing the new SBM paradigm [79,93]; searching to understand supply network tensions, conflicting interests [94], and complementary synergies to improve collaborative innovation performance; educating customers on new paradigms [95] such as sufficiency-driven SBM [68]; SBMI teams' adoption of tools and practices [83]; and change management [14,96]. Table A1 in the appendix provides a clear definition of each of the antecedent's key concepts, the supporting publications, and the deepness of investigation of each element.
Therefore, similarly to BMI, there are key factors that an organization has that ultimately enable or hinder it from (1) conducting SBMI efforts in the first place and (2) having success with these efforts. It points towards an analogous direction to mainstream BMI: dynamic capabilities and organizational design. Organizational design is critical since it positively or negatively influences the organizational environment for dynamic capabilities, which are responsible for successful SBMI [9,14]. It can either improve dynamic capabilities or hinder it, as it shapes beliefs and values, materializing into strategic orientation and operational practices [9].
The SBMI literature also emphasizes the relevance of leadership's vision [96], values, and beliefs [9,83]. As the literature has few large companies' and incumbents' cases featuring a high level of sustainability-oriented entrepreneurship, the relationship between leaders' sustainability orientation on the one side, and business processes and capabilities on the other, could be less straightforward when moving into larger organizations, as there are larger vested interests and more complex hierarchies and relationships. Figure 9 depicts the summary of SBMI literature on firm-level antecedents. We built the framework considering the strategic level, the capability level, and the individual level. At the strategic level, organizational design plays a major role in shaping values, beliefs, strategy orientation and definition, and the underlying organizational structure. It exerts a top-down influence on the dynamic capabilities level. At this level, we organized the capabilities from the literature for executing the SBMI process. At the bottom level, the individual incentive schema, the people's beliefs, and orientation towards sustainability and innovation exert a bottom-up influence on the SBMI capabilities.

Design Tools and SBMI Process
A research stream is focused on building and proposing design tools to support the SBMI process. It primarily considers SBMI characteristics that differ from mainstream BMI, which renders mainstream BMI-related tools limitedly useful with variations. It largely bases its tools on the Business Model Canvas [80,97,98] and creates variations adding multiple stakeholders [84] relevant for sustainability. Output examples are the triple-layered Canvas [85,99], the Prototyping Canvas [100], and the Sustainable-Oriented Service Innovation (SOSI) tool [98].
Considering the SBMI process, the research stream usually highlights the lean startup and the customer development [100] approaches, which are process-supporting tools. This means understanding the process as identifying an opportunity [95], finding a solution, designing a BM, and implementing the BM in practice [69]. Additionally, the rationale behind the process is iterative by nature, with multiple feedback loops, experimentation and fast knowledge generation while consuming low resources [69,100]. Considering the importance of linking the SBMI process with the overall strategy, this literature stream also proposes building a business case [81], implementation of road-mapping [80,81], and prioritization techniques [80]. Short et al. [76] also emphasize strategically aligning with the core business, creating complementarities and complementary assets with stakeholders [101], hence effectively managing paradoxical tensions that arise and overcoming the limited thinking that achieving sustainability entices losing economic performance [90,102].
Thus, the stream combines special-purpose tools that aggregate SBM specificities to this process, mainly targeting the fuzzy front end by filtering and identifying sustainable opportunities [80,103] and the relevance of including a wide variety of stakeholders beyond shareholders and business partners [104,105]. the framework considering the strategic level, the capability level, and the individual level. At the strategic level, organizational design plays a major role in shaping values, beliefs, strategy orientation and definition, and the underlying organizational structure. It exerts a top-down influence on the dynamic capabilities level. At this level, we organized the capabilities from the literature for executing the SBMI process. At the bottom level, the individual incentive schema, the peopleʹs beliefs, and orientation towards sustainability and innovation exert a bottom-up influence on the SBMI capabilities.

Design Tools and SBMI Process
A research stream is focused on building and proposing design tools to support the SBMI process. It primarily considers SBMI characteristics that differ from mainstream BMI, which render mainstream BMI-related tools limitedly useful with variations. It largely bases its tools on the Business Model Canvas [80,97,98] and creates variations adding multiple stakeholders [84] relevant for sustainability. Output examples are the triple- Therefore, this research stream shows the underlying assumption that design tools are the key to successful SBMI [69]. This notion means that the differing characteristic from mainstream BMI is usually related to two key aspects. First, SBMI differs from BMI since it needs filtering-down opportunities that are sustainable by nature [106], creating a sustainable value proposition [82]. This first element reflects the extensive effort to build design tools for identifying sustainable opportunities and diagnosing value-uncaptured dimensions [107]. Second, this stream highlights the need to include more stakeholders into the SBMI process, especially those affected by it [70], which goes beyond financiallyand capability-related partners as in mainstream BMI. The reflections of this notion are the effective inclusion of cocreation models [80] and stakeholder value mapping [70] in the innovation process. This has largely focused on design thinking and value stakeholder mapping as the main associated tools.
To better structure the literature, we built the framework depicted in Figure 10, fitting the SBMI process into the dynamic capabilities' framework. We also organize the tools, methods, activities, and practices into each SBMI stage where they are most applicable. We provide in Appendix Table A2 the description of the key concepts, explaining their connection to each SBMI process stage and the supporting publications. Sustainability 2021, 13, x FOR PEER REVIEW 21 of 39 Figure 10. SBMI management framework.

Discussion
The review developed throughout the paper used two different methodological approaches. From such approaches, we investigated the relationship between SBMI and BMI literature. From observations of our results, we identified gaps that can benefit from better integration between BMI and SBMI. We discuss these gaps in the next subsections.

Gap 1: Degree of Sustainability: Are the SBMs Fully Sustainable or Better Than Before?
This research gap relates to the outcome of SBMI, the definition and implementation of SBMs. Table 6 in the SLR showed that most SBMI studies consider a SBM those BM that present any feature more sustainable than the previous BM, depicting the outcomes of SBMs as final, well-defined solutions. Most studies target the environmental dimensions, particularly the SDG 12 of "responsible consumption and production", without considering social or even other environmental dimensions. At the same time, studies often cite the complexity of measuring the resulting SBM's degree of sustainability, hence, highlighting the existence of rebound effects (i.e., adopting a potential sustainable-oriented solution leads to worsening rather than improving) and the impossibility of knowing and predicting ex ante how sustainable a BM is in reality [100]. This characteristic draws attention to the fact that the SBMI could possibly be "better than before" than fully sustainable BMs.

Discussion
The review developed throughout the paper used two different methodological approaches. From such approaches, we investigated the relationship between SBMI and BMI literature. From observations of our results, we identified gaps that can benefit from better integration between BMI and SBMI. We discuss these gaps in the next subsections.

Gap 1: Degree of Sustainability: Are the SBMs Fully Sustainable or Better Than Before?
This research gap relates to the outcome of SBMI, the definition and implementation of SBMs. Table 6 in the SLR showed that most SBMI studies consider a SBM those BM that present any feature more sustainable than the previous BM, depicting the outcomes of SBMs as final, well-defined solutions. Most studies target the environmental dimensions, particularly the SDG 12 of "responsible consumption and production", without considering social or even other environmental dimensions. At the same time, studies often cite the complexity of measuring the resulting SBM's degree of sustainability, hence, highlighting the existence of rebound effects (i.e., adopting a potential sustainable-oriented solution leads to worsening rather than improving) and the impossibility of knowing and predicting ex ante how sustainable a BM is in reality [100]. This characteristic draws attention to the fact that the SBMI could possibly be "better than before" than fully sustainable BMs.
There are interesting emerging research fields that specifically target ecological or equitable BMI. For example, circular BMI has made interesting advancements regarding the challenges and means to overcome them for enabling the circular economy [108]. Social BMI is another interesting strand looking specifically for the bottom of the pyramid [109], frugal models [110], reducing poverty [73], alleviating hunger [88], and increasing equality [75]. The SBMI literature benefits from these studies, especially considering the need to understand specificities associated with each effort towards sustainability. However, we believe that SBMI's focus needs to be on accomplishing full sustainability, orchestrating the different paths to, in a combined manner, propose means to reach sustainability for the triple bottom line. As shown in Table 6, however, many SBMI studies target only a branch of sustainability, remaining as an intermediate step towards achieving full sustainability.
We propose to address SBMI initiatives as an ongoing, never-ending process. Hence, we recommend that studies should purposefully consider these three macrodimensions: (1) Equitable BMI, when the BMI effort also addresses a social dimension, encompassing the social BMI literature. There is no significant effort to reduce environmental impacts.
(2) Ecological BMI, when the BMI focuses on diminishing environmental damage, such as reducing CO 2 emissions, reducing waste, and inducing a circular economy. It implies no direct impact on society. Here, we would classify the emerging circular BMI primarily in this research stream, though we recognize that circular BMs may systemically affect society through changes in consumption behavior and concept, through labor-intensive services, among others. Finally, (3) sustainable BMI addresses all triple-bottom-line dimensions, mitigating environmental damages through eco-innovation for instance, while also, for example, alleviating poverty and increasing access to basic needs such as water and energy. A more detailed dive into potential microdimensions is presented by Lüdeke-Freund et al. [5].
It is at this level that SBMI literature should focus, purposefully leveraging on advancements of the intermediate substreams of equitable and ecologic BMI to reach powerful means for a continuous search for sustainability. In this context, we propose the following research questions: What are the specific processes, tools and elements of social and ecological BMI? How do we integrate them to keep moving towards a fully SBM? How do we overcome specific challenges of them?
Despite the conceptual nature of this gap, its consequences are significant, for it may break down the systematic and continuous search for full sustainability. As we argue throughout this study, sustainability has the characteristics of a wicked problem. It is almost impossible to understand its causes and effects completely, is often elusive due to inherent systemic complexity, its problems and solutions change over time, and it does not display right-or-wrong, but better-or-worse scenarios (see Batie [26] for a discussion). Hence, SBM is a continuous search for, not a solid, well-defined goal. This places emphasis on the problem of looking at SBM as static units. Instead, it makes sense to look into underlying organizational phenomena that allow for systematic SBMI, continuously pursuing "better than before" scenarios, suitably treating SBMI as a wicked problem. The next gap looks inside this issue of the antecedents of a "sustainable business engine creation" through the dynamic capabilities lens.

Gap 2: The Antecedents for SBMI: Are Dynamic Capabilities the Same for Both SBMI and BMI?
Studies often cite dynamic capabilities as the core firm-level antecedent for executing the SBMI process [14], which is aligned with the BMI literature [42]. Considering that a set of capabilities comprises the functioning of a company [12], it makes sense given that SBMI success depends on the creation and/or transformation of capabilities and processes that underlie any BM [13,111]. However, as we show in Section 4.2.1, even though the analyzed publications recognize the dynamic capabilities' relevance for successful SBMI [112], there is a lack of studies aiming to uncover its distinctive dimensions for SBMI. One notable exception is Inigo et al. [14], whose study attempts to deepen our understanding of dynamic capabilities for sustainability [112]; the authors, however, highlight the need to study this further. We propose, in Figure 10 and Table A1, an abstraction from the publications addressing antecedents. We classified and defined the mapped antecedents as part of the different dynamic capabilities of sensing, seizing and transforming. Nevertheless, the framework remains incomplete, as there are few studies targeting these antecedents, especially at the capabilities level.
Opposite, within mainstream BMI the dynamic capabilities research stream has advanced significantly and provided good understanding of their distinctive dimensions [13,15,111,113,114]. Understanding these dimensions for BMI assists in measuring dynamic capabilities, e.g., a team's ability to learn is a relevant dimension of sensing capability, the top management team's strategic orientation and its influence on the BMI portfolio management influences sensing and seizing capabilities, and so on [15]. Therefore, this supports a diagnosis of their current situation, hence, allowing systematic managerial action to potentiate these capabilities and pursue BMI in long term. Despite Pieroni et al. [21] and Inigo et al. [14] who call for further studies on dynamic capabilities for SBMI, it has, to date, not evolved. Bocken and Geradts [9] is the first attempt to uncover organizational design mechanisms within this research stream. However, the dynamic capabilities' dimensions for SBMI are not the focus of the study. The bottom line is that we still do not know much about capabilities' dimensions that enable pursuing SBMI systematically as a long-term goal.
Therefore, we propose the following question: Is there a set of distinctive dimensions for dynamic capabilities in SBMI that are not the same as in mainstream BMI? Considering the often-cited complexity regarding SBMI [100], it may demand specific dynamic capabilities' dimensions for sensing, seizing, and transforming SBM design into SBMIs. The prominence of the "design-implementation gap" is a good illustration of this point [115]; SBMI literature largely focuses on design tools and experimentation as the approaches for conducting SBMI. This means mainly influencing sensing and seizing capability, in which the output is a SBM design. This focus is far away from understanding capabilities' dimensions for SBMI. Thus, dynamic capabilities for SBMI are still hard to measure, and as a consequence hard to manage.

Gap 3: The SBMI Process: The Role of Open Innovation
In Section 4.2.2, we build a processual framework of SBMI, along with supporting tools, methods, activities and practices. However, there was a clear absence of publications targeting the role of open innovation, considered critical for mainstream BMI, with notable exceptions of [116][117][118]. This is surprising, considering the high relevance of multiple stakeholders' integration and engagement for SBMI [119]. Further engagement with, and understanding of contributions from, different stakeholders in SBMI needs further consideration in future research works. The research stream on circular BMI has made advancements in this direction, especially targeting the collaborative innovation process, proposing tools [120], and discussing the applicability of open innovation for collaborative circular BMI [108]. There is also a growing literature on open innovation and sustainabilityoriented innovation, especially targeting technological innovations [121][122][123]. The research line targeting sustainability-oriented technologies has grown, but this needs to be linked to the SBMI level, calling for further research on the subject to better grasp the SBM innovation funnel and its management. In this regard, we propose the following research questions: How can open innovation improve the adoption and performance of SBMI efforts? What are the potential contributions of different types of stakeholders to SBMI?

Gap 4: The Lack of Tools, Methods, Activities and Practices Supporting the Transforming Stage of the SBMI Process
Design tools and the SBMI process are a more deeply explored field. We derived an overall framework of the iterative SBMI process, with three stages of sensing, seizing and transforming. The overall SBMI process is roughly the same as the BMI process. The SBMI literature offers sustainability-oriented tools, methods, and practices supporting its process's specificities. However, they often target sensing and seizing stages of the SBMI process, supporting the identification of opportunities, validation, primarily targeting the SBM design.
When moving forward to implementation, from the final seizing stages through transforming, there is a significant gap of approaches, contributing to the "design-implementation's" gap persistence. An important research question for future research is: What should be the tools, methods, activities and practices supporting the transforming/implementation stage of the SBMI process?
This lower abundance of approaches for transforming and effectively leading implementation is also true for the BMI literature, which has, nevertheless, made significant advancements. BMI studies emphasize that reaching out to the transforming capability demands solid sensing and seizing capabilities rooted in the organizational structure [15]. This means to keep the funnel running (in an economically feasible manner) until reaching the transforming bottleneck. After this point, recent advancements highlight change management [65], organizational ambidexterity [51,124] in managing multiple BM [25], organizational design for the new BMs [125,126], supply network and regulatory scenario orchestration [127], organizational culture, and leadership [128], resources and capabilities building [129] and strategic human resources management [130].

Gap 5: SBMI Outcomes and Their Connection to Competitiveness and Performance
BMI literature arose and acquired momentum by showing (appealing) BMI outcomes, such as disruption with new BM displacing well-established business paradigms and huge performance (economic) gains. Moreover, it also suggested that superior technologies are only game-changing when they accompany a sound BM [131]. Some examples of this feature are Uber and Taxis [13], Airbnb and Hotels [132], Netflix and Blockbuster [133], Fintechs, and Incumbent Banks [134], among others. This is effectively demonstrated in a Christensen's [135] innovators' dilemma dynamics in the BMI literature. More importantly, the BMI literature has also shown a change in the competitive pattern, from technological innovation to BM innovations; it entices Schumpeterian creative destruction [136] in the sense that one either does and seizes benefits or does not do and probably dies. It is also part of the increasing interest of companies to pursue BMI, urging companies to restructure themselves to create BMI management capabilities [15]. SBMI emerged following a different path. The interest in the topic is not led by disruption or examples of cases that revolutionized a particular industry. On the contrary, the majority of SBMI examples usually show modest economic results. SBMI literature arose with the need to address sustainable development needs, primarily focusing on solving environmental and social issues. This is not to say that this reason is not appealing and of utmost importance. However, the competitive business landscape demands accomplishing economic aspects and market disruptions. This is reflected in the definition of an innovation, which is no longer an invention or a design only when it successfully reaches the market and is scalable. SBMIs need to result in superior competitive advantage, therefore challenging the mainstream business paradigms.
Short et al. [76] is an exception. The authors do show environmental gains through BM evolution. Still, they deliberately show virtuous value creation cycles, combining environmental gains to the economic dimension, depicting performance gains and competitive advantages. Doing so illustrates paths to overcome existing thoughts that there are trade-offs between ecological and economic value. Yip and Bocken [41] is another example, deliberately linking SBM adoption in the banking sector to customer loyalty and traction, therefore improving performance. We propose future research to focus on the following question: What are the impacts of SBMI outcomes in companies' performances and competitiveness?

Contributions
The findings presented in the results section effectively address our research goals, which were defined as (1) exploring the relationship between BMI and SBMI literatures in an organized manner, and (2) identifying the antecedents, capabilities, tools, and processes that should be part of a systematic approach to SBMI.
Particularly, the bibliometric analysis showed how the BMI and SBMI literature has been developing, with SBMI spinning out at an early stage from BMI and evolving in an independent manner. Indeed, we found that there is little integration when viewed through the VOSViewer lens. Through the bibliographical coupling analysis, it was possible to check that the authors and journals of BMI studies are different from SBMI ones. Additionally, we see that while BMI is moving forward to deepen understanding of its antecedents for systematization, SBMI's focus is on experimentation.
Despite this scarce integration, it seems there is no barrier regarding the future development of the SBM and SBMI fields in a more integrated way. Literature on SBMI provides frameworks, archetypes, and definitions. At the same time, many studies point out the gap related to implementation management. In this regard, integration with the BMI body of knowledge could be important for SBMI. The presented SLR explores how SBMI relates to BMI management. We organized the SBMI literature regarding its outcomes, which helps in defining sustainability-oriented BMI categories, and we created a framework of firm-level antecedents, design tools, and processes for SBMI.
The findings of our research advance the literature by promoting paths for managing SBMI systematically and for consistently informing managerial actions. Ultimately, this could lead to enhancing the practical adoption of SBMI.
However, we observed critical gaps in the SBMI literature based on the results, especially considering the BMI advancements. In Section 5.5, we discussed and analyzed such gaps, providing research questions for future works. Figure 11 summarizes the main contributions of our paper considering the bibliometric analysis and SLR results and the consequent discussions. This figure is composed of three layers. In the first one, the main findings from the bibliometric analysis are presented; in the second one, the findings from the SLR are summarized as well as the gaps identified in this analysis; in the last layer, the lessons from BMI and future research paths, addressing the gaps listed, are provided, indicating relevant propositions for future research.

Limitations
Although this study's goals are to push forward the concept of SBMI management, emphasizing what we can learn from the BMI literature, this study also has its limitations. Previous reviews, such as Bocken et al. [40], used correlated keywords (circular, green, social, among others). Considering our focus, we narrowed down the SLR's search strategy to capture studies that explicitly deal with BMI for sustainability, without using correlated keywords such as circular BMI or BMI for the circular economy, social BMI, green BMI, among others.
Considering the SBMI field is now more mature [66], we were able to focus on SBMI keywords. This was not true during previous reviews, such as by Bocken et al. [40], for which the time of execution meant that combining related keywords made more sense. Nevertheless, one interesting perspective should capture how these correlated fields' advancements help answer the existing gaps to frame the systematic SBMI. As we emphasized in the discussion section, the identified gaps can surely benefit from integrating these research streams. SBMI management, as we propose, will certainly call for different sustainability-oriented BMI, which also helps us understand the specificities surrounding each effort. Certainly, a social-oriented BMI differs from a circular BMI. Further work could also explore the overlaps, synergies and opposite views of the BMI, SBMI, circular BMI, service BMI and social BMI disciplines all together.
Our study also focused on defining SBM not as a goal but as an ongoing continual effort, and we also point out that sustainable development will require multiple companies and supply networks of companies working together and transforming through SBMI. Hence, studies targeting the supply-chain level and the buildup of the supply network of sustainable companies would add value to our knowledge regarding SBMI. Our study does contribute to this line of thinking. Increasing the adoption of SBMI by numerous companies can help to achieve a shared vision between supply-chain actors, facilitating the adoption of sustainability-oriented BM by multiple actors. However, policy-oriented studies can combine to provide greater motivation and an adequate environment that favors SBMI. Some examples include adding taxes to unsustainable actions, educating society, and other institutional factors that direct companies' needs towards SBMI.

Limitations
Although this studyʹs goals are to push forward the concept of SBMI management, emphasizing what we can learn from the BMI literature, this study also has its limitations. Previous reviews, such as Bocken et al. [40], used correlated keywords (circular, green, social, among others). Considering our focus, we narrowed down the SLR's search strategy to capture studies that explicitly deal with BMI for sustainability, without using correlated keywords such as circular BMI or BMI for the circular economy, social BMI, green BMI, among others.
Considering the SBMI field is now more mature [66], we were able to focus on SBMI keywords. This was not true during previous reviews, such as by Bocken et al. [40], for which the time of execution meant that combining related keywords made more sense. Nevertheless, one interesting perspective should capture how these correlated fieldsʹ advancements help answer the existing gaps to frame the systematic SBMI. As we emphasized in the discussion section, the identified gaps can surely benefit from integrating these research streams. SBMI management, as we propose, will certainly call for different sustainability-oriented BMI, which also helps us understand the specificities surrounding each effort. Certainly, a social-oriented BMI differs from a circular BMI. Further work could also explore the overlaps, synergies and opposite views of the BMI, SBMI, circular BMI, service BMI and social BMI disciplines all together.
Our study also focused on defining SBM not as a goal but as an ongoing continual effort, and we also point out that sustainable development will require multiple compa-

Concluding Remarks
Developing a sustainable company is a long-term, never-ending quest of innovation and a never-ending pursuit of SBMI through "better than before" series of subsequent BMs towards fully sustainable BMs in the future. This dynamism calls for understanding how companies can develop the capability to continually and systematically conduct SBMI. This is not to say that local solutions, case studies, and specific examples of SBMI are not necessary. Instead, we argue that the SBMI literature should pursue the goal of understanding how to develop such capability, by, for example, building on BMI literature's advancements as well as deeply understanding the specificities of available exemplary solutions and case studies.
To the best of the authors' knowledge, our study provides the first attempt to organize, interpret, and analyze the SBMI literature to build a coherent framework for continuous and systematic SBMI. However, SBMI is still a recent research stream with many opportunities for research, and this work has uncovered five research gaps leading to a set of future research questions.
As BMI literature is more advanced and many companies are trying to create capabilities for systematic BMI, we set out to provide this knowledge to shed light on some paths for SBMI literature advancement. In particular, we corroborate the notion of dynamic capabilities as primary antecedents for SBMI. The still-generic view of DC as sensing, seizing, and transforming means that the concept is, at the same time, applicable to any innovation effort but does not effectively inform how to create such capabilities in practice. Thus, it calls for a definition of what DC for SBMI looks like in terms of observable organizational phenomena, and how it is linked to the different organizational design actions to inform managerial action to create the SBMI capability effectively.
Last but not least, our work could be complemented with more investigation to open more research avenues. Sustainability involves high systemic complexity, it is hard to predict ex ante the outcome of most sustainability-oriented actions, and it is against the majority of existing businesses ecosystems. We need practical adoption of the idea, companies moving forward with potential solutions, trial and error, and many failures. Regardless, there is a need to compel practical adoption, and our proposition is in line with this idea.   Balancing BM portfolio management

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The capability of the company to keep a mix of projects that keeps organizational financially healthy while exploring SBMs for the future.

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Influences the extent to which SBM projects will pass, kill or keep gatekeeps, and the extent to which SBM projects will receive resources.

Tool, Method, Activities, and Practices Description Publications
Analogical Reasoning • A creativity-supporting practice that leverages cross-industry and cross-company knowledge to import ideas from one context to another (i.e., using Rolls Royce pay-by-the-hour engine model to commercialize, for example, refrigerators as a service). • Applicable in creative stages of sensing and seizing; to identify opportunities and to design an SBM.