A Framework of Key Growth Factors for Small Enterprises Operating at the Base of the Pyramid

: Enterprises operating at the Base of the Pyramid (BoP) ﬁnd it di ﬃ cult to simultaneously achieve economic (proﬁtable growth) and social (poverty alleviation) outcomes. This study builds on a previously published systematic literature review that identiﬁed the key growth-promoting factors of the Small, Medium, and Micro Enterprises (SMMEs) operating in this space. A Grounded Theory Approach was followed to identify six core focus areas, which form the basis of a practical framework to evaluate SMMEs at the BoP, namely: Business modelling; business strategy; innovation; marketing; strategic alliances; and sustainable development. Expert screening interviews were conducted to evaluate the framework for credibility and conﬁrmability. Thereafter, 57 for-proﬁt South African enterprises were surveyed to empirically explore how SMMEs view and implement these framework components. The outcome of the study is a validated high growth-promoting BoP portfolio framework against which SMME owners can evaluate their enterprises to identify areas of growth and development.


Background and South African Context
Conventional trickle-down theory has proven ineffective in reducing social inequalities and, although poverty has reduced globally under capitalist systems, wealth distributions have become increasingly skewed, with 50% of the world's wealth in the hands of 1% of individuals [1]. Prahalad and Hammond suggest that wealth distribution may be viewed as an economic pyramid in which more than 4 billion people, who live on less than $2 a day, may be referred to as the Base of the Pyramid (BoP) [2,3].
An example of a country where these inequalities are especially pronounced is South Africa. South Africa has a strong formal sector, its economy is quite advanced, and it has a strong financial sector and a good higher education sector. Regulations governing business activity are generally mature and well enforced [4,5].
However, even though considerable progress has been made since the mid-1990s to improve the well-being of citizens, 55.5% of South Africans still lived in poverty in 2017, surviving on less than

Study Aim and Objectives
Statistical analyses by the World Bank's International Monetary Fund [10] and the United Nations Conference on Trade and Development [11] show that it is consistently the most difficult to do business in countries with large BoP markets, primarily due to macro-environmental factors. Impediments include economic, financial, political, governance, and cultural factors [12][13][14]. These difficulties are compounded by the risk and uncertainty inherent in the BoP market [15][16][17].
Although initial literature mostly focused on ways of approaching the BoP as a viable market [2,18], recent evolutions of the concept have extended this purely market-based view [19][20][21]. The BoP concept shifted from the original BoP (the fortune at the base of the pyramid) to BoP 2 (Fortune with the BoP) and BoP 3 (Sustainable Development through innovation and entrepreneurship).
Enterprises operating at the BoP struggle to achieve the dual goals of sustained profitable growth and sustainable poverty alleviation. Profitable enterprise action at the BoP is certainly not a new concept and, although the BoP approach has been improved upon by scholars and practitioners alike, there seems to be no universal consensus or readily available tools for a structured approach to achieving profitability and sustainable poverty alleviation [2,22,23].
Studies of the BoP have mainly focused on the role of Multi-National Corporations (MNCs), while the few that considered the role of SMMEs have limited their research to the development of business models for contextually specific enterprises [24]. As far as could reasonably be determined, no decision support framework for SMME owners operating at the BoP existed at the time of our study, nor was there any indication of one specifically tailored to the unique context of South Africa.
The main research questions of this study are therefore stated as: • What are the growth-promoting factors that will assist SMMEs operating at the BoP towards attaining higher, lasting growth and socio-economic development? • How can these growth-promoting factors be incorporated in a coherent framework to aid SMME decision makers to achieve sustainable growth? This article presents a conceptual theoretical framework, based on an earlier-published systematic literature review (see [24]) in which the key factors that promote high growth in SMMEs at the BoP were identified, namely: business modelling; business strategy; innovation; marketing; strategic alliances; and sustainable development. From these concepts, a framework outline was populated with growth factor dimensions. The aim of this article is to present the evaluation of the framework, based on the analysis of a survey of 57 for-profit South African enterprises as well as expert interviews. The study delivered a high growth-promoting BoP framework to guide SMME owners in a structured approach to evaluate SMMEs operating at the BoP, so as to achieve sustainable and profitable growth.
The article is structured as follows: The methodology is outlined in Section 2, followed by a summary of the framework (Section 3). The framework evaluation is discussed in Section 4, and Section 5 concludes.

Methodology
A comprehensive body of literature informs the qualitative derivation of theory from text and data [25,26], and provides systematic methods for building conceptual frameworks [27]. Grounded Theory methods [25,26] are suitable to developing theories of relationships among multidisciplinary concepts, as they share constructivist and interpretivist philosophical positions, making them useful in conceptual framework synthesis [28]. A Grounded Theory-based approach was thus followed to develop the framework and eventual management tool, using the Conceptual Framework Analysis (CFA) approach proposed by Jabareen [27], is an eight-phase process. The phases are structured into three parts, namely: (1) Understanding the landscape (qualitative); (2) developing the framework; and (3) evaluating the framework (mostly quantitative), as well as their objectives and outcomes, as shown in Table 1. Phases 1 to 5 served as the foundation of conceptual framework development by allowing the collection, refinement, and analysis of identified literature sources, after which key concepts could be integrated into various clusters. The first iteration of the conceptual framework was constructed during Phase 6. Subsequently, Phase 7 documented the framework evaluation through the use of 5 semi-structured interviews and a survey with 57 responses. The final validated framework is ready for use by SMME owners to evaluate their enterprises. The sections that follow provide more information regarding the methodology that was adopted for the literature review, interviews, and survey. The complete systematic literature review is described in an earlier publication [24] with some key elements of the literature review approach summarized here.
The following systematized literature review process was undertaken to arrive at a comprehensive list of enterprise growth promoting factors: This systematized review methodology has been shown as appropriate for identifying a comprehensive list of literary works [29]. Google Scholar, Thomson Reuters' Web of Science, Elsevier's Scopus, Ebscohost, and ProQuest, which together cover multiple domains of science and social science, were selected for this study. In order to perform a thorough primary search and avoid leaving out important alternative wordings of the titles of literary works, the search phrase for the review was broken down into three components, namely, degree modifying, adjectival, and objectival components. For example, the phrase high growth enterprise can be broken down into the degree modifying component high, the adjectival component growth, and the objectival component enterprise. Table 2 lists the different components from which combinations were made and searched for. The search results were filtered by reading the abstract, and by briefly scanning the document as a whole to find any additional literary works that were deemed relevant to the topic. These literary works were then sorted into two groups, Influential Works (IWs) and Supporting Works (SWs), and further ranked and categorized to identify the appropriate factors (see Section 3).

Interviews
The researchers interviewed five experts to determine the framework's credibility and conformability. Experts were selected based on their years of experience in the areas of SMME development, exposure to the BoP market, and years of experience in sustainable enterprise planning, formation, development, and growth. The focus was on their background in management of the relevant areas, namely strategy, innovation, marketing, finances (venture capital and private equity), business partnerships, and organizational design/architecture. Following each interview, the framework was updated in an iterative fashion. After five interviews, the framework had sufficiently stabilized to allow the survey to be formulated. The measures of performance that were defined through the framework development process informed the assessment that was conducted to determine if this point of stability has been reached. The changes required in each iteration were minimal, due to the very detailed and structured approach followed in the framework's development.

Survey
The survey was constructed by breaking down the conceptual framework into logical statements to reflect its primary requirements, where after the list was refined by reducing overlap. Respondents were asked to rank their opinion of the impact and managerial difficulty of various practices of the growth factors with regard to:

•
The impact that each best practice has on growth; and • How difficult each best practice is to manage effectively.
Owners and/or managers of South African social enterprises were surveyed. The majority of the social entrepreneur survey sample was constructed from respondents from the South African Breweries Foundation (SABF) database of social entrepreneurs. Other respondents were found via an ad hoc approach of scouring the internet for social enterprise award winners (e.g., the Schwab Foundation's South African winners). As the majority of the respondents came from the SABF database and other award-winning social enterprises, the credibility of the respondents was ensured.
A survey instrument was designed to incorporate all the key features of the framework at that point in time; this was aimed at assessing the framework's validity in an empirical manner, and at confirming the need for the framework, its reliability, its relevance, and its usefulness.
The survey instrument can be found in Supplementary A. The survey delivered 57 complete survey responses from social entrepreneurs operating at the BoP. The survey analysis included a frequency analysis as well as a statistical analysis, which explored variance and regressions.

Understanding the Landscape-Framework Outline (Parts 1 and 2)
The findings of the systematized literature review process upon which this article is based [24] revealed that, although there are many varying definitions of what constitutes high growth of an enterprise, there is a high level of convergence of the factors that promote such growth. These factors have also proven to be generally independent of the particular sector in which the enterprise operates. While the literature review is not repeated here, the manner is outlined by which results were used to inform the framework.

Identifying Enterprise Growth Factors
The comprehensive approach that was adopted to compile such factors from literary sources takes into account not only the popularity of the literary work through noting the citation count, but also the degree of linkage (cross referencing) between highly cited works. The identified literature was sorted into two groups.
The first group incorporated all literary works that were specifically related to enterprise growth, without considering the degree modifier. Literary sources in this group were labelled as Influential Works (IWs). The second group pertains to literary works that are supportive in nature, in that they contribute to building the theory that supports the claims of IWs; these works are therefore labelled as Supporting Works (SWs). Altogether, 114 IWs and 45 SWs were identified (to be found in Supplementary B).
Key Influential Works (KIWs) are the highest ranked IWs and have arbitrarily been chosen such that each growth factor is addressed at least twice. By working in descending order from the highest-ranked IWs, the minimum number of IWs necessary to ensure that each factor is addressed twice was found to be up to and including the IW with ID number 45. These 45 IWs were thus established as KIWs.
The KIWs were determined to ensure that the frequency with which the characteristics are addressed in the top-rated IWs (i.e., the KIWs) can be compared to the overall frequency with which each characteristic is focused on in the IWs. If the two are proportional to one another, it is clear that the characteristics are well distributed throughout the range of IWs. Figure 1 affirms that the selected growth factors are well distributed among the literary works. KIWs.
The KIWs were determined to ensure that the frequency with which the characteristics are addressed in the top-rated IWs (i.e., the KIWs) can be compared to the overall frequency with which each characteristic is focused on in the IWs. If the two are proportional to one another, it is clear that the characteristics are well distributed throughout the range of IWs. Figure 1 affirms that the selected growth factors are well distributed among the literary works. The systematized approach to compiling literary factors from literary sources was outlined in Figure 2. It is a rigorous approach that considers not only the popularity of the literary work by noting the citation count, but also the degree of linkage (cross referencing) between highly cited works. The approach is further strengthened by ensuring that new studies are not neglected due to what is known as the Matthew Effect. By modifying the citation counts with this factor, and incorporating the degree of linkage, it is an easy (albeit time consuming) process to arrive at a comprehensive set of factors selected from the identified and ranked literary works.  The systematized approach to compiling literary factors from literary sources was outlined in Figure 2. It is a rigorous approach that considers not only the popularity of the literary work by noting the citation count, but also the degree of linkage (cross referencing) between highly cited works. The approach is further strengthened by ensuring that new studies are not neglected due to what is known as the Matthew Effect. By modifying the citation counts with this factor, and incorporating the degree of linkage, it is an easy (albeit time consuming) process to arrive at a comprehensive set of factors selected from the identified and ranked literary works. These factors, which were found to promote high growth, were listed in the following four logical groupings: Founder attributes: Leadership qualities; team size and synergy; relevant industry experience; level of education; entrepreneurial experience; entrepreneurial orientation, and; breadth of professional and social network; Enterprise attributes: Size and age of the enterprise; legal form; geographic location and expansion; industry life cycle stage and market environment; financial capital; organizational structure; vision, mission, and communication, and; commitment to and motivation for growth; Business practice factors: Strategy; strategic alliances; business planning; marketing; international sales; acquisition; creating unique value for customers, and; innovation; Human resource factors: Human capital, and performance-based incentives. The factors within each grouping are summarized in Figure 3.  These factors, which were found to promote high growth, were listed in the following four logical groupings: Founder attributes: Leadership qualities; team size and synergy; relevant industry experience; level of education; entrepreneurial experience; entrepreneurial orientation, and; breadth of professional and social network; Enterprise attributes: Size and age of the enterprise; legal form; geographic location and expansion; industry life cycle stage and market environment; financial capital; organizational structure; vision, mission, and communication, and; commitment to and motivation for growth; Business practice factors: Strategy; strategic alliances; business planning; marketing; international sales; acquisition; creating unique value for customers, and; innovation; Human resource factors: Human capital, and performance-based incentives. The factors within each grouping are summarized in Figure 3.
expansion; industry life cycle stage and market environment; financial capital; organizational structure; vision, mission, and communication, and; commitment to and motivation for growth; Business practice factors: Strategy; strategic alliances; business planning; marketing; international sales; acquisition; creating unique value for customers, and; innovation; Human resource factors: Human capital, and performance-based incentives. The factors within each grouping are summarized in Figure 3. With a ranked list of high growth factors already organized into specific categories, it is possible to argue which of the aforementioned factors are most important, given the purpose and scope of this study.
A two-step process was followed. First, the growth promoting factors were classified into their respective fields within, or outside of, the scope of this research. Some factors span a number of fields, as would be expected. This step served to eliminate the factors that fell outside of the scope of this study. Second, the interrelationships among the within-scope factors were structured hierarchically, with considerations given to the frequency of occurrence in IWs and KIWs.
A number of factors were adopted to delimitate the study, and these were taken into account in defining the boundaries of Figure 4, including: Organizational size, influencing factors (internal factors within the direct control of the enterprise rather than external factors which are outside the direct control of the enterprise), business life cycle stage (focusing only on the start-up phase whereby  With a ranked list of high growth factors already organized into specific categories, it is possible to argue which of the aforementioned factors are most important, given the purpose and scope of this study.
A two-step process was followed. First, the growth promoting factors were classified into their respective fields within, or outside of, the scope of this research. Some factors span a number of fields, as would be expected. This step served to eliminate the factors that fell outside of the scope of this study. Second, the interrelationships among the within-scope factors were structured hierarchically, with considerations given to the frequency of occurrence in IWs and KIWs.
A number of factors were adopted to delimitate the study, and these were taken into account in defining the boundaries of Figure 4, including: Organizational size, influencing factors (internal factors within the direct control of the enterprise rather than external factors which are outside the direct control of the enterprise), business life cycle stage (focusing only on the start-up phase whereby the enterprise is already functional and has navigated through all the regulatory red tape, and is well positioned for moving into the growth-phase), and strategic focus (business strategy as opposed to human resource strategy). the enterprise is already functional and has navigated through all the regulatory red tape, and is well positioned for moving into the growth-phase), and strategic focus (business strategy as opposed to human resource strategy). From the list of 25 factors that arguably promote high growth, eight were within the scope of this research (marked in red in Figure 4). The following are the eight internal business factors (i.e., within the locus of control of the entrepreneur), and most relevant in the start-up phase of the enterprise life cycle (see the red factors in Figure 4): Business planning (BP): Although important throughout the enterprise life cycle, planning is an iterative process that must consider multiple areas of concern as well as projections for the future functioning of the enterprise, making it ever so imperative in the start-up phase; Financial capital (FC): Acquiring financial capital must occur during the pre-start-up and startup phases to ensure smooth running of the enterprise during start-up; From the list of 25 factors that arguably promote high growth, eight were within the scope of this research (marked in red in Figure 4). The following are the eight internal business factors (i.e., within the locus of control of the entrepreneur), and most relevant in the start-up phase of the enterprise life cycle (see the red factors in Figure 4): Business planning (BP): Although important throughout the enterprise life cycle, planning is an iterative process that must consider multiple areas of concern as well as projections for the future functioning of the enterprise, making it ever so imperative in the start-up phase; Financial capital (FC): Acquiring financial capital must occur during the pre-start-up and start-up phases to ensure smooth running of the enterprise during start-up; Innovation (IN): This aspect plays a crucial role at all times. For young enterprises in the start-up phase with inherently less resources at their disposal, IN can provide the much-needed edge in the industry; for older post start-up phase enterprises, IN can maintain the enterprise's dominance; Marketing capabilities (MC): Marketing has much to do with reaching and interacting with customers, which is pivotal in both the start-up and post start-up phases of the enterprise life cycle; Size and age (SA): While this factor cannot be controlled, the literature has revealed the tendency of young enterprises to grow the most; this associates SA with the start-up phase; Strategic alliances (SAL): SAL formation is critical in the start-up and post start-up phases of the enterprise; however, it is associated with relationships with role players outside the control of the enterprise, and is therefore seen as a jointly external and internal (business strategy related) factor; Strategy (ST): ST includes both human resource and business ST, and is imperative regardless of the age of the enterprise; it is therefore relevant to both the start-up and post start-up phases of the enterprise life cycle; Unique value for customers (UVC): The enterprise should be unique and build the customer base by winning over customers through increased value, especially during its early start-up phase.
From the systematized literature review, this list of eight factors were refined to arrive at five high-growth factors of importance to this study. These factors include business planning, business strategy, innovation, marketing, and strategic alliances.
Based on interviews aimed at validating the framework (see Section 4), as well as its high frequency of occurrence in the BoP 3 literature reviewed, sustainable development is an additional and explicit factor that was deemed important to include (opposed to being integrated in the other factors). Its importance relates to the need to foster a multi-modal sustainable view of growth at the BoP (i.e., social, economic, and environmental), and it was therefore included as a unique concern for further deliberation.
Sections 3.2-3.7 expands on each of the considerations that are deemed relevant and important for enterprise owners and managers in attaining high growth when targeting the BoP. These considerations were used to develop a list of requirements for growth. Thus, the aim of the next six sub-sections is to answer the question: How can each of these six factors be applied in the context of the BoP?

Business Planning by Utilising Business Modelling
Business planning provides a means of combining most of the fundamental necessities of the enterprise into a clear-cut and ordered set of procedures. A comprehensive plan is set out in a business model, which covers all the key areas of doing business. Thus, it is clearly of value to understand the role of business models for operating at the BoP [30].
It is important to carefully plan for the BoP enterprise's customer relationships. Here, the literature emphasizes direct engagement with the BoP, for example to test the viability of value propositions [31,32]. Business modelling allows for detailed planning of the management of customer relationships [33]. This is also closely related to the manner in which the enterprise defines channels to understand its engagement and communication with BoP customer segments when delivering a product, service, or combination thereof. This includes the creation of distribution channels along with, or even before, creating demand [34], and bringing the product and BoP customer closer together [35][36][37]. BoP enterprises also need to be cognizant of how to model revenue streams that relate to the income of BoP actors [38]. This entails balancing profitability with goals such as poverty alleviation and empowerment of BoP actors [39][40][41][42]. Further, it is of importance to determine key resources and manage the resource constraints that are likely to crop up, including raw material, financial, production, and human resource constraints [43]. Key partnerships are a strategic capability that entails engaging in horizontal and equal authority arrangements when developing solutions in close collaboration with BoP actors [44][45][46][47]. Key activities include strengthening the value chain [48]; investing in core competencies early and consistently [49]; building logistics and manufacturing infrastructure sensitive to BoP conditions; and deskilling of work for BoP co-creators and distributors [40].

Business Strategy
In formulating a business strategy for entering the BoP, it is necessary for founders to establish from the outset that they are in a business, with a profit motive. Here, some suggestion is made to follow a non-competitive approach to reduce competition [18] and thinking for-profit, and not to act as a charity or philanthropic institution would. Strategies must consider the underlying technology architectures for updating and upscaling the enterprise; further, the issue of leapfrogging upper-tier markets is mentioned as a strategic approach [3,50,51].
In light of the above, some activities are presented by which to explore an uncontested market space. This study adopted the Blue Ocean Strategy as an activity system to find an uncontested market space, to minimize costs, and to maximize value at the BoP [52][53][54]. This requires incorporating the essential features of a good strategy, such as: (1) Outlining the strategic profile of the enterprise, industry, and current and potential competitors; this also entails assessing and understanding the needs of BoP livelihoods at the micro level [55]; (2) addressing key organizational hurdles for optimal strategy implementation; (3) determining competitive factors that can minimize or eliminate competition, such as low cost relationships with other BoP actors and overcoming the value-cost trade-off [53]; (4) getting into the field and actively engaging with stakeholders (in particular with BoP actors as consumers, employees, distributors, and suppliers) to build local embeddedness and capacity [56][57][58]; (5) creating new demand (market space) for products by considering non-customers, whilst focusing on both the differences and commonalities among what buyers value. This entails navigating the living environment of, and having low-cost access to, the BoP to facilitate lower prices [35,59]. The creation of demand also hinges on continuous access to affordable products in a resource-depleted environment [60]. This can be achieved by utilizing both formal and informal distribution channels [33,56,61].

Innovation
As innovation consistently contributes to successful and growing enterprises [62], it is understandably an important component of any business strategy that intends to target the BoP market. A number of reasons underlie the importance of innovation as a means of successfully exploiting new ideas when dealing with and selling to the BoP [63]. Ideas concerning successful products or services for the BoP are inherently more complex, as there are a number of unique hurdles that an enterprise must clear before the BoP can be pursued as a market.
It can therefore be argued that innovation takes place through a continuous cycle of improvement. Essentially, inclusive innovation efforts (regarding knowledge creation, acquisition, absorption, and distribution) must primarily aim to benefit individuals at the BoP and marginalized communities by leading to improved access to products, services, or economic benefit [45,47,[64][65][66][67][68].
It has been argued that innovation at the BoP is often incremental with a focus on diffusion, local needs, demand, and customer suitability [55]. Outcomes of the innovation process have been suggested as focusing on large price performance improvements [69], and on the development of frugal innovations where the entrepreneurs explore simpler, less expensive, more convenient value offerings [70].
The diffusion of innovations at the BoP is also a significant focus; here, innovations should be undertaken within an inclusive frame of discourse and knowledge [46,64,71]. Value offerings must exhibit compatibility, complexity, observability, relative advantage, and trialability to promote diffusion and adoption [72]. Further, it has been shown that innovation, alongside training, can be used to improve the impact of corporate social responsibility investment on their sustainability [73]. It could therefore be argued that the innovation process entails action pertaining to: (1) A needs assessment in close cooperation with the BoP to guide the innovation search process; (2) generating innovative solutions to social problems by utilizing a wide range of partners, search tools, and mechanisms (e.g., engaging at the grassroots level through multi-stakeholder engagement platforms); (3) applying a process for selecting the most appropriate innovative solution; (4) establishing stopping criteria to terminate too costly/unfruitful ideas, testing the robustness of proposed solutions, and reducing risk (key technical and market uncertainties); (5) capturing maximal value by maximizing compatibility (consistency) with existing norms and values of a wide range of stakeholders, while minimizing the need for new skills and knowledge to use/benefit from the innovative solution (e.g., by deskilling of work for BoP co-creators and distributors); (6) making the outcomes/results of innovation clearly visible to the potential buyer/user, and; (7) managing the process where potential BoP adopters can experiment with the innovation prior to investment [5,21,69,74,75].

Marketing Capabilities
Marketing to the upper tiers of the economic pyramid is well documented and generally occurs in a highly competitive environment. It is widely acknowledged that price, product, promotion, and place are intrinsically important to any marketing plan. Whereas high-end markets are usually easily accessible and have a set of customers who will likely be able to afford a high price, this is usually not the case at the BoP. Instead, difficulties in each of these areas play a large role in the marketability of a product or service, thus redefining the way in which SMMEs need to reach their customers [76].
The BoP does not resemble the common consumerist market; therefore, it will, in most cases, not be sufficient to merely lower prices on existing high-end market products by reducing functional capabilities in product design, since customers at the BoP are also sensitive to product and service quality. The specific focus on Marketing ensures that the SMME arrives at a viable value offering for the BoP market. This focus addresses the steps to be taken to ensure that a feasible market is targeted, while also ensuring that a real need at the BoP is addressed [77,78]. It entails action to: (1) Develop a holistic view of marketing, by understanding all of its dimensions; (2) foster a customer-centric enterprise and targeting specific market segments [79][80][81]; (3) identify customer segments by behavioral and need characteristics and demographics; (4) market branding needs to then be developed in line with the segment being pursued, to maximize visibility and hone in on the market's specific desires; (5) establish appropriate channels to ensure market accessibility and overcoming access barriers to the BoP [58]. This may be done by utilizing both formal and informal distribution channels [33,56,61]; and (6) deliver along the dimensions of affordability, acceptability, availability, and awareness [34,76,82].

Strategic Alliances
Since many BoP targeting enterprises are substantially under-resourced and operating in an ecosystem that poses particularly new and unique difficulties in serving clients effectively, partnerships with numerous role-players are often vital to success. This enables the enterprise to gain access to much-needed expertise and resources. By forming alliances, SMME owners and managers can share their core competencies in an effective manner and bring about improved growth.
Cross-sector partnerships facilitate access to resources and capabilities [83], and institutional gaps (access to capital, technology, and managerial expertise) are best filled with diverse partners [82,84,85]. For example, NGOs may aid in better understanding the needs and behaviors of the BoP [58,86]; the civil and business sector is ideal for addressing customer needs; the public sector aids well with responding to the institutional environment [83]; and, finally, funding is more likely to come from NGOs and philanthropic institutions [19,87].
However, strategic alliances bring with them a heightened risk that the enterprise's core competencies could be opportunistically appropriated by the partner, which requires that a clear approach to managing the relationship is followed. By managing the relationship appropriately, risks can be mitigated, while gains are leveraged. This promotes the need for further research on the nature of strategic alliances at the BoP.
Strategic alliances relate the purposeful activities that the owner and managers of the BoP-targeting SMME must conduct in order to develop safe and productive alliances with strategic partners. The strategic alliance system describes that the following key areas should be addressed: (1) Determining if an alliance is strategically ideal-collaborating to gain capabilities, legitimacy, create new value, access local resources and markets, and cut costs may be reasons for looking for a partner [83,87]; (2) engaging in a process of evaluating and selecting partners-for example, consideration should be given to those who are open to learning, are mission driven, and are socially embedded, all of which are ideal traits for BoP partners [19]; (3) designing the alliance via contracts and negotiations. Here, consideration should be given to promoting long-term working relationships, training, education, empowerment, and skills transfer for partners [65,88,89]; and (4) managing, assessing, renewing, or potentially terminating the alliance. With respect to alliance management, the following are important: Network development; cultural aspects; communication; relational dynamics; knowledge management and learning; resource management; alliance performance evaluation; and risk management [90][91][92][93][94].

The Importance of Sustainable Development at the BoP
Inherent in all social entrepreneurship activities is a need for sustainable operations, and the pursuit of lasting poverty alleviation through SMME action is no exception. Sustainable development has become increasingly important to SMMEs for a number of reasons. The first of these is that many enterprises are assessed from a supply chain perspective-at a local scale, but also by global players for whom it is commercially important for sustainable development and a necessary requirement for entry into international markets.
Sustainable development also provides monetary benefits via increased efficiencies and conservation techniques, for example, energy, waste, and water. It provides access to new markets and competitive advantage, in that an enterprise might differentiate itself through the use of sustainable practices. Enterprises that practice sustainable development benefit on a global scale through increased brand recognition. Lastly, sustainability measures minimize enterprise risk in terms of financial, environmental, social, and even legal impacts, and opens up new opportunities as the visibility of the enterprise will facilitate easier access to financial capital.
Sustainable development is the conscious action to ensure that all of the SMME's activities are sustainable. The sustainable development system requires constant attention to ensure that the outcome of the enterprise, as well as each of its operations and choices of direction, are sustainable. This implies economic, social, and environmental feasibility on all counts. In essence, the system ensures that any changes are beneficial in all three dimensions, and that negative consequences are mitigated as far as possible. This needs to be done by: (1) Practically addressing the economic, social, and environmental needs of the poor; and (2) evaluating and promoting the long-term feasibility of the business from an economic, social, and environmental perspective [95][96][97][98][99][100].

The Conceptual Framework
The discussion in the preceding sections highlighted the rationale for incorporating each of the elements in a coherent conceptual framework. This framework is summarized in Figure 5, which outlines the detail of each of the six key factors for sustainable profitable growth at the BoP.
The discussion in the preceding sections highlighted the rationale for incorporating each of the elements in a coherent conceptual framework. This framework is summarized in Figure 5, which outlines the detail of each of the six key factors for sustainable profitable growth at the BoP.
The framework integrates all the aspects that are deemed important to enterprise growth, based on the literature reviewed.

Framework Evaluation (Part 2)
As described in Section 2.2 the framework was validated by means of semi-structured interviews and an industry survey. The following sections outline the findings from these validation activities.

Interviews
Five industry experts were engaged in semi-structured interviews to test the framework. After introducing the framework, the answers to specific questions were recorded and coded. The main The framework integrates all the aspects that are deemed important to enterprise growth, based on the literature reviewed.

Framework Evaluation (Part 2)
As described in Section 2.2 the framework was validated by means of semi-structured interviews and an industry survey. The following sections outline the findings from these validation activities.

Interviews
Five industry experts were engaged in semi-structured interviews to test the framework. After introducing the framework, the answers to specific questions were recorded and coded. The main results are summarized in Table 3, which provides the question in the context of the framework and summarizes the respective answers. Table 3. Semi-structured interview outcomes.

Question and Aim Answer Summary
Are the identified core focus areas needed for sustained growth?
The interviewees unanimously agreed that each of the specified managerial core focus areas are necessary for attaining sustained high growth at the BoP, including sustainable development; the latter is not a high growth factor per se, but was deemed necessary for lasting improvements to the BoP.
Does the framework clearly identify all BoP concerns?
All concerns are well indicated, though the framework should include more background on the worldviews and cultural characteristics of the BoP market. Are the essential features of a framework exhibited? Every one of the essential features of a framework are incorporated.
Does the framework have the ability to aid in the attainment of growth?
The interviewees all believe that the framework, if correctly implemented, will aid SMME owners and/or managers in attaining higher enterprise growth when targeting the BoP market. Strengths include that it teaches people a new language, the literature base is strong, and it provides a clear process to follow. Complexity was seen as a possible stumbling block requiring possible practical guidance by a consultant/practitioner.

Identifying potential framework improvement areas
A sharp criticism was that the average SMME owner would find it difficult to implement such a detailed framework, and that each enterprise that targets the BoP would struggle to incorporate each consideration in their endeavors. However, the framework is "as good as it gets" as its level of detail "can make all the difference".

Assessing systemic desirability and cultural feasibility
The cultural feasibility of the framework was deemed both systemically desirable and culturally feasible. However, participants clarified that the framework is indeed only suitable for upper-tier entrepreneurs who wanted to enter the BoP. Further, even with some education regarding the framework, they will "need a disciplined, structured approach to go through it." Assessing systems' performance measures All the interviewees agreed that the framework should perform well, being efficable, efficient, effective, and ethical.
Is a feasible evaluation process incorporated in the framework?
The framework incorporates a feasible evaluation process for owners and/or managers, but should include a scale to help them to ascertain where their problem area lies.
Would the experts be willing to hypothetically help implement the framework?
All of the validators claimed that they would indeed be prepared to implement the framework in a BoP targeting enterprise under their control; a few of the experts commented that, to the best of their knowledge, there is no existing framework with as detailed a process for appropriately targeting the BoP. What other aspects are important for implementing the framework?
The biggest concern was the importance of training the potential users, as SMME owners are "busy fighting fires all day," so that a detailed framework such as this would require the involvement of consultants.
Overall, each of the validation questions was answered positively, and validated the core system components of the framework.

Sample Description
After the conceptual framework was improved, based on the specific concerns of the experts, a survey was conducted of social entrepreneurs in South Africa, who specifically focused on improving the lot of the BoP. In total, 57 valid responses were received. The sample consisted of micro enterprises. The respondents were classified according to the industry in which they operate, from primary to tertiary, and by a category for their present growth rate. As illustrated in, and as per standard industry classification (SIC), a growth category could not be obtained for two of the respondents, as they were only founded in the present year, while the businesses of three of the respondents grew at more than double the inflation rate.

Frequency Analysis
In the sections that follow, summary graphs of respondent feedback are provided for each of the framework factors (See Appendix A). The first two graphs show the growth impact and managerial difficulty of the factor, as reported by respondents. Two additional graphs summarize the core framework focus areas of each factor, as outlined in Section 3.2.
As shown in Figure A1 in Appendix A, respondents seem to fall into two extremes in terms of the growth impact of the business model factor. Eleven respondents (19%) indicated that they have not addressed this issue at all, while the majority (35 respondents or 61%) believe that this factor is important with a consistent positive growth impact on the SMME. Even while saying that it clearly has a positive growth impact, 30 respondents or 53% indicated that they find implementing and using business modelling tools as either difficult or complex to manage. If one were to exclude the respondents who had not yet addressed the factor, this proportion increases to 64%.
In slight contrast to the impact of addressing aspects pertaining to the business model, more than 70% of respondents believe that business modelling is an important element of planning. They place a lot of emphasis on understanding and determining their key resources for their chosen business model, and on establishing or estimating the relevant revenue streams. However, when considering the manner of implementation, there seems to be less emphasis in customer segmentation or defining channels to the customer-an aspect that is clearly required for estimating revenue streams. It is also clear that most companies consider participating in the BoP market "on their own", as is shown by the low importance attached to identifying any partners: Less than 30% of respondents attached importance and urgency to planning for this aspect, while only slightly more than 20% address this directly during implementation.
As far as sustainable development impact is concerned (See Figure A2 in Appendix A), less than half of the respondents believe that there is either a consistent positive impact, or at least that benefits outweigh costs; 32% believe the impact is negligible; and 10.5% state that the impact is negative. Some of the comments seem to indicate that this might be a phenomenon that emerges in developing countries, where less emphasis is generally placed on sustainability and more focus is placed on economic and social needs. Although most respondents highlighted environmental factors, these clearly remain secondary to the needs of the BoP.
As far as strategy is concerned, there is a strong consensus that it has a strong positive impact on growth, but that it is at the same time difficult and even complex to manage. It is vital that a clear strategy is documented for both planning and implementation and compiled through direct interaction with potential customers by getting into the field. The strong focus on economic needs is also reflected in the priority of planning at a strategic level, where factors such as affordability, accessibility, and acceptability of solutions are important. There is thus a strong positive correlation in the results between Figures A3 and A4 (Appendix A) with respect to addressing economic needs of the target audiences of SMMEs and affordability.
Even though a large majority (67%) of respondents believe that innovation plays an important part and contributes towards growth, quite a few believe that innovation is actually quite easy to manage when compared to strategy. The most important aspect here is active grassroots engagement, with a clear indication that one should not experiment, but should focus on a fully tested innovation before adoption. This in all probability is addressing the perception of customers at the BoP that they are being experimented with or even exploited. This goes hand in hand with many respondents stressing the need for involving the community.
Creating innovative solutions to either develop new ideas or improve existing offerings is regarded as having a high positive impact, but is extremely difficult, or even complex, to manage. The authors believe that this seeming complexity is the result thereof that not many companies have a sustained high growth in this market, as it is a relatively new approach with little experience or help from consultants' models or frameworks to facilitate a successful implementation. As before, the consensus that solutions have to be affordable, customer centric, and acceptable within the community are highlighted as important, and must be addressed at least implicitly. There is also consensus that branding, which is so vital at high income levels, seems to be less important here.
Strategic alliances are considered as important and as having a positive impact by 65% of respondents, even though identifying key partnerships had the lowest priority in business modelling. One reason could be that this is regarded as a more operational problem that can potentially be addressed during implementation. This is also in line with the findings associated with Figure A6 in Appendix A, where most companies seem to be entering the market on their own, at least originally. As far as planning for Strategic alliances is concerned, BoP entrepreneurs prioritize the development of alliances, but mostly seek private sector partnerships. It thus becomes vital for Government to take cognizance of this when seeking to establish public-private partnerships to encourage economic growth. There is also again a strong emphasis on economic drivers, including minimizing transaction costs. One contra-indicator is the fact that relatively little emphasis is placed on co-creation, and/or addressing cultural differences. However, this aspect was highlighted under strategy, where it was to be developed through grass roots involvement and engagement. Even so, the extent to which these SMMEs are truly engaging with grassroots actors and have truly inclusive practices seems to be limited.

Reliability and Validity
The reliability and validity of the survey questionnaire was tested with the Cronbach reliability test, where alpha is a measure of internal consistency-that is, how closely related a group of items is. This is considered to be a measure of scale reliability. The alpha values for each of the constructs and sub-constructs are shown in Table 4; the comments include particular concerns that would raise the alpha value meaningfully if omitted from the survey (and therefore the framework). Given the satisfactory alpha values, no changes were required to increase reliability. This implies that the requirements of the framework are reliable, in that they exhibit internal consistency (interconnectedness) and homogeneity (uni-dimensionality).

Variance Analyses
The components of a box and whisker plot in Figure 6 indicate the manner by which the figures in the remainder of the article outline the means and confidence intervals for the growth rates of each growth factor, for each of the survey question categories. Given the satisfactory alpha values, no changes were required to increase reliability. This implies that the requirements of the framework are reliable, in that they exhibit internal consistency (interconnectedness) and homogeneity (uni-dimensionality).

Variance Analyses
The components of a box and whisker plot in Figure 6 indicate the manner by which the figures in the remainder of the article outline the means and confidence intervals for the growth rates of each growth factor, for each of the survey question categories. When rating the perceived growth impact of each factor, Figure 7 clearly indicates that the highgrowth respondents rate the impact consistently higher for all factors, except for marketing, where almost everyone agreed that it has a positive impact.  Figure 8 shows the response summary for the question pertaining to managerial difficulty, which indicates how difficult each growth factor is to manage. It appears that, as enterprises grow, the difficulty of managing the growth factors increases, though only up to a point. It is hypothesized that, in moving from declining to positive growth, respondents tend to see the underlying complexities of each of the growth factors; once they have dealt with them, the processes become natural and engrained in the enterprises, leading to a decrease in their managerial difficulty. Interestingly, failing enterprises show a decidedly lower perception of managerial difficulty, which likely indicates a low regard for a structured approach to growth. It appears that the perceived When rating the perceived growth impact of each factor, Figure 7 clearly indicates that the high-growth respondents rate the impact consistently higher for all factors, except for marketing, where almost everyone agreed that it has a positive impact. Given the satisfactory alpha values, no changes were required to increase reliability. This implies that the requirements of the framework are reliable, in that they exhibit internal consistency (interconnectedness) and homogeneity (uni-dimensionality).

Variance Analyses
The components of a box and whisker plot in Figure 6 indicate the manner by which the figures in the remainder of the article outline the means and confidence intervals for the growth rates of each growth factor, for each of the survey question categories. When rating the perceived growth impact of each factor, Figure 7 clearly indicates that the highgrowth respondents rate the impact consistently higher for all factors, except for marketing, where almost everyone agreed that it has a positive impact.  Figure 8 shows the response summary for the question pertaining to managerial difficulty, which indicates how difficult each growth factor is to manage. It appears that, as enterprises grow, the difficulty of managing the growth factors increases, though only up to a point. It is hypothesized that, in moving from declining to positive growth, respondents tend to see the underlying complexities of each of the growth factors; once they have dealt with them, the processes become natural and engrained in the enterprises, leading to a decrease in their managerial difficulty. Interestingly, failing enterprises show a decidedly lower perception of managerial difficulty, which likely indicates a low regard for a structured approach to growth. It appears that the perceived  Figure 8 shows the response summary for the question pertaining to managerial difficulty, which indicates how difficult each growth factor is to manage. It appears that, as enterprises grow, the difficulty of managing the growth factors increases, though only up to a point. It is hypothesized that, in moving from declining to positive growth, respondents tend to see the underlying complexities of each of the growth factors; once they have dealt with them, the processes become natural and engrained in the enterprises, leading to a decrease in their managerial difficulty. Interestingly, failing enterprises show a decidedly lower perception of managerial difficulty, which likely indicates a low regard for a structured approach to growth. It appears that the perceived difficulty is a necessary precursor to positive growth attainment, whereas viewing it too simplistically may lead to trivializing its importance and thus inhibiting advancement. difficulty is a necessary precursor to positive growth attainment, whereas viewing it too simplistically may lead to trivializing its importance and thus inhibiting advancement. Figure 8. Managerial difficulty according to growth factor and growth rate. Figure 9 shows respondents' priority level in managing of each growth factor. Ideally, the priority level is listed as important (regardless of urgency) for orientating the enterprise for growth, in accordance with the framework requirements. It must be noted that the results shown here are dependent on multiple framework requirements, whereas the two preceding figures only address the highest order growth factors, and not their sub-requirements. Respondents with higher growth rates regard the growth factors as increasingly important to plan for. The necessity of planning for business modelling and sustainable development seems to be generally well accepted across the range of enterprises with different growth rates. However, planning for innovation, marketing, and strategic alliances seem to exhibit very clear differences between the growth categories, with more successful enterprises viewing planning for these as much more important and urgent. Figure 10 outlines the results of a detailed analysis of numerous requirements for each growth factor, detailing the manner in which each is implemented by the respondents. Ideally, the subrequirements are addressed directly/explicitly to best position the enterprise for growth, in accordance with the framework requirements.   Figure 9 shows respondents' priority level in managing of each growth factor. Ideally, the priority level is listed as important (regardless of urgency) for orientating the enterprise for growth, in accordance with the framework requirements. It must be noted that the results shown here are dependent on multiple framework requirements, whereas the two preceding figures only address the highest order growth factors, and not their sub-requirements. difficulty is a necessary precursor to positive growth attainment, whereas viewing it too simplistically may lead to trivializing its importance and thus inhibiting advancement. Figure 8. Managerial difficulty according to growth factor and growth rate. Figure 9 shows respondents' priority level in managing of each growth factor. Ideally, the priority level is listed as important (regardless of urgency) for orientating the enterprise for growth, in accordance with the framework requirements. It must be noted that the results shown here are dependent on multiple framework requirements, whereas the two preceding figures only address the highest order growth factors, and not their sub-requirements. Respondents with higher growth rates regard the growth factors as increasingly important to plan for. The necessity of planning for business modelling and sustainable development seems to be generally well accepted across the range of enterprises with different growth rates. However, planning for innovation, marketing, and strategic alliances seem to exhibit very clear differences between the growth categories, with more successful enterprises viewing planning for these as much more important and urgent. Figure 10 outlines the results of a detailed analysis of numerous requirements for each growth factor, detailing the manner in which each is implemented by the respondents. Ideally, the subrequirements are addressed directly/explicitly to best position the enterprise for growth, in accordance with the framework requirements.  Respondents with higher growth rates regard the growth factors as increasingly important to plan for. The necessity of planning for business modelling and sustainable development seems to be generally well accepted across the range of enterprises with different growth rates. However, planning for innovation, marketing, and strategic alliances seem to exhibit very clear differences between the growth categories, with more successful enterprises viewing planning for these as much more important and urgent. Figure 10 outlines the results of a detailed analysis of numerous requirements for each growth factor, detailing the manner in which each is implemented by the respondents. Ideally, the sub-requirements are addressed directly/explicitly to best position the enterprise for growth, in accordance with the framework requirements. difficulty is a necessary precursor to positive growth attainment, whereas viewing it too simplistically may lead to trivializing its importance and thus inhibiting advancement. Figure 8. Managerial difficulty according to growth factor and growth rate. Figure 9 shows respondents' priority level in managing of each growth factor. Ideally, the priority level is listed as important (regardless of urgency) for orientating the enterprise for growth, in accordance with the framework requirements. It must be noted that the results shown here are dependent on multiple framework requirements, whereas the two preceding figures only address the highest order growth factors, and not their sub-requirements. Respondents with higher growth rates regard the growth factors as increasingly important to plan for. The necessity of planning for business modelling and sustainable development seems to be generally well accepted across the range of enterprises with different growth rates. However, planning for innovation, marketing, and strategic alliances seem to exhibit very clear differences between the growth categories, with more successful enterprises viewing planning for these as much more important and urgent. Figure 10 outlines the results of a detailed analysis of numerous requirements for each growth factor, detailing the manner in which each is implemented by the respondents. Ideally, the subrequirements are addressed directly/explicitly to best position the enterprise for growth, in accordance with the framework requirements.  A general increasing trend is depicted above, showing that higher-growth enterprises tend to address the requirements of the growth factors more directly and explicitly, in comparison to their less successful counterparts. It is possible that, as business strategy becomes engrained in the operations of successful enterprises, it becomes a less pressing concern that is addressed implicitly, accounting for the lower mean of the highest growth rate enterprises.

Conclusions
A key challenge faced by South African enterprises operating at the Base of the Pyramid is the difficulty of achieving sustained profitable growth whilst simultaneously promoting sustainable poverty alleviation. This study developed a framework of growth promoting factors to provide consultants, enterprise owners, and academics alike with a means by which to guide Small, Medium, and Micro-sized Enterprises (SMMEs) operating in the BoP towards attaining higher, lasting growth and socio-economic development. Existing enterprise growth models and frameworks have been found wanting in terms of their ability to cater for the unique approach necessary for navigating through the adverse and atypical conditions prevalent at the BoP.
A systematic literature review identified 25 antecedents to enterprise growth (or growth factors), of which five were within this study's scope in that they are business strategy related and within direct control of the enterprise. These are: Business modelling for detailed planning; following a suitable and detailed business strategy for long-term growth; utilizing innovation to consistently create value and respond rapidly to market changes; implementing good marketing practices to ensure maximum value delivery to customers; and forming strategic alliances to bolster core competencies, leverage resources, and scale operations. Furthermore, pursuing sustainable development was determined as crucial to ensuring both lasting profitability and social impact is realized.
The framework was iteratively developed by synthesizing the BoP requirements with conventional growth factor processes, verifying the preliminary framework, and incorporating validation findings in its final design. Framework validation included a survey of 57 for-profit South African enterprises to empirically establish need, reliability, relevance, and usefulness, and; expert focus interviews to maximize usability by identifying key stakeholder requirements within the framework. Table 5 summarizes the growth factors, with the empirically developed relative ranking of dimensions, as well as the policy insights derived from each factor. The table shows the dimensions, relative ranking of the concepts, and the SMME management insights that follow from the priority afforded to the elements and their extent of implementation. The aim with this table is to highlight possible weaker areas in managing SMMEs to achieve high growth. The authors acknowledge that each SMME is faced by challenges specific to its context, and it is in this respect that the framework may aid in highlighting good practices that could be explored, depending on the challenges faced and the phase of the SMME's growth path. It provides high-level dimensions and the best practices associated with them and serves as a guideline towards growth.
The unique contribution of this work is embodied in: The framework's novelty, combining multiple fields of knowledge pertaining to success at the BoP and in traditional markets into a cohesive whole for the first time; the confirmed practical significance of the framework requirements in that it provides users with an empirically vetted procedure for increasing growth potential as evidenced by the survey data; and the optimized usability due to the visually clear framework, and incorporation of key focus areas for dealing with key stakeholders.
The limitations of the study point towards the following areas of future research: Increasing depth of survey analysis: The validation process survey holds valuable information that is sufficiently useful for the purposes of this study. However, with respect to its ability to accurately determine key differences across sectors, it falls short due to its small sample size of 57. This promotes the need for a much bigger survey to be conducted on social enterprises wherein at least 30 samples are obtained per sector for researchers to perform a cross-sectoral analysis, which would add more value to the framework in terms of its ability to deduce key requirements particular to each sector when dealing with key stakeholders. Furthermore, it is not easy to measure the impact social enterprises are making in their ecosystems, but including this information in a future empirical analysis could add valuable insight into whether those enterprises with the highest growth rates are doing the most good, or if there is some degree of exploitation occurring.
Empirical testing: The framework's subsystems could be tested by real life application (i.e., validation by implementation), and thereafter refined via a thorough empirically backed investigation into the impact that the application of the framework has on the social enterprise.
Improving usability: To make the framework more user-friendly for SMME owners with little time on their hands and less familiarity with the concepts contained in the framework and its subsystems, a usable interface could be developed to make the framework accessible to users other than consultants. • Strategy is the activity that is best planned for, and most respondents agree that it has a big impact on growth • Issues related to economic feasibility ranks highly, especially in terms of accessing the BoP • Issues that are externally focused (other than target markets), such as considering competitive factors, are less focused on • Success requires that good partnerships need to be formed -trust is very important and minimizes the costs of engagement • In line with the low priority afforded to partners (see the business modelling section), strategic alliances is the growth factor that SMMEs give less attention to; • The platform and engagement function is relatively neglected due to the low priority of strategic alliances • Private sector alliances are slightly preferred over public sector alliances • Evaluation of alliances is very poorly addressed • Managing cultural differences is poorly addressed.

Higher level of priority and implementation
• • Marketing seems to be one of the most planned-for consideration by SMMEs • Engagement and knowing the BoP segmentation seems to be less planned for or implemented • Multiple forms of exchange should be exploited, including structured, networked, pure, and centralized exchanges (e.g., using standardized processes, social links, trade lefts, and political influences, respectively) • Innovation seems to be prioritized, especially in terms of value to the target audience (skills, outcomes visible to adopters, and experimentation with solutions) • Capturing quality-yet another economic consideration-seems to be of lower priority; this relates to compatibility with existing norms, which makes the innovation viable • Engagement and linkages to communities seem to be prioritized, as there seems to be a large focus on the target market • The link to economic aspects seems weak, as SMMEs do not prioritize the implementation of criteria to terminate costly/unfruitful ideas early on • There is less focus on understanding the market (segmentation) and facilitating a range of exchange mechanisms, and these may become misaligned • Solutions are co-created with the target market to ensure good products, and to ensure that they do not feel experimented on