About the Author(s)

Louis R. Epoh symbol
Graduate School of Business Leadership, University of South Africa, South Africa

Chengedzai Mafini Email symbol
Department of Logistics, Vaal University of Technology, South Africa


Epoh, L.R. & Mafini, C., 2018, ‘Green supply chain management in small and medium enterprises: Further empirical thoughts from South Africa’, Journal of Transport and Supply Chain Management 12(0), a393. https://doi.org/10.4102/jtscm.v12i0.393

Original Research

Green supply chain management in small and medium enterprises: Further empirical thoughts from South Africa

Louis R. Epoh, Chengedzai Mafini

Received: 20 Mar. 2018; Accepted: 03 May 2018; Published: 21 June 2018

Copyright: © 2018. The Author(s). Licensee: AOSIS.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background: For South African small and medium enterprises (SMEs) to gain and maintain competitive advantages and succeed, they have to change their practices and adapt their strategies to the dynamic environment of today. A better understanding and application of green supply chain management practices by SMEs could enable such enterprises to improve their performance and succeed in their operations.

Objectives: This study aimed to analyse the relationship between green supply chain management, environmental performance and supply chain performance in South African SMEs.

Method: A conceptual model was proposed and subjected to empirical verification using data collected from SMEs based in Gauteng province. The structural equation modelling procedure was used to test hypotheses in the proposed relationships in SMEs within different industries.

Results: The results of the study indicated mixed outcomes. No relationships were found between environmental performance and two green supply chain dimensions, namely green purchasing and eco-design. However, the remaining dimensions of green supply chain management, namely reverse logistics and legislation and regulation, positively and significantly predicted environmental performance. In turn, environmental performance positively and significantly predicted supply chain performance.

Conclusion: Integrating green supply chain management practices, especially reverse logistics and adherence to legislation and regulation into the SME business strategy, leads to the improvement of environmental and overall supply chain performance.


Over the past few decades, green supply chain management (GSCM) has gained popularity across the world, mainly in developed countries but in developing nations as well (Govindan et al. 2014). This interest in GSCM is driven by the efforts of governments and other institutions to either prevent or limit the disastrous effects of industry-related activities on the environment (Wong, Wong & Boonitt 2015). Consequently, many organisations worldwide have begun to show a high level of commitment to GSCM through the implementation of environmental practices that are intended to reduce and preserve the degradation of the environment (Tiwari, Chang & Choudhary 2015). The practice of GSCM extends the traditional concept of supply chain management by providing an improvement of products and services that are environmentally friendly across their complete life-cycle (Ahi & Searcy 2015; Gunasekaran, Subramanian & Rahman 2015; Rostamzadeh et al. 2015). Integrating green practices in organisational strategy helps to increase not only efficiency but also the overall performance of the firm (Srivastava 2008). However, despite the increased popularity of GSCM in many countries, there are still several areas that require further research, mainly as greening the supply chain has been identified as a key issue of sustainable supply chain management (Green et al. 2012; Large & Thomsen 2011). In particular, research on GSCM still has to be extended to small to medium enterprises (SMEs) as the majority of studies conducted have been confined to large organisations (Ahi & Searcy 2013).

In South Africa, the economic contributions of SMEs are well documented in the available literature (Kongolo 2010; Maduku, Mpinganjira & Duh 2016; The Banking Association of South Africa 2017). Nevertheless, in spite of their contributions to the economic growth of South Africa, the success of SMEs is hindered by an assortment of challenges, which include the lack of access to financing, the lack of skills, the lack of systems that attract and retain experienced managers and the lack of formalised organisational structures, amongst others (Cant & Wiid 2013; Kengne 2016; Pretorius 2009). The Small Enterprises Development Agency (2016) indicates that the failure rate of SMEs in South Africa lies around an alarming 71%, which suggests that these enterprises have to adopt other strategies to disrupt this negative trajectory and to stimulate growth. Thus, as indicated by Urban and Naidoo (2012), SMEs in South Africa have to continually reinvent their strategies to be able to sustain their operations and take advantage of opportunities.

This study aimed to analyse the relationship between GSCM, environmental performance and supply chain performance (SCP) in South African SMEs. Despite concerted efforts by the South African government to promote SMEs, there are still widespread and high incidences of failure in this sector of the economy (Fatoki 2014; Kalane 2015; Ramukumba 2014). The World Economic Forum (2016) ranks South Africa as one of the lowest in terms of competitiveness in the SME sector. As a result of these mounting challenges, it is crucial that sustainable solutions to increase the chances of survival and success of SMEs in South Africa be found. This study presupposes that assuming GSCM practices could be a solution in the bid to increase the performance of SMEs and hence prevent their inadvertent failure. Environmentalists across the world are working hard to help SMEs consider embracing and implementing GSCM to reap the benefits associated with it (Mohanty & Prakash 2014; Rettie, Burchell & Riley 2012). Moreover, as put forward by several scholars (Ahi & Searcy 2013; Liu et al. 2011; Rettie et al. 2012), the application of GSCM results in benefits that include high operational efficiency, satisfactory financial performance and a good reputation, amongst others. In view of this, beleaguered enterprises such as South African SMEs stand to realise these benefits and hence excel in their operations should they implement GSCM practices.

In addition to the above, a literature search for studies on GSCM amongst South African SMEs revealed a lack of previous studies. The major studies available (Mafini & Muposhi 2017; Van Rensburg 2015) disregarded the relationship dimensions under consideration in the current study, thereby proving a research gap that still has to be filled. Still, the present study is significant in several ways. Firstly, the advent of globalisation and the collapse of trade barriers have increased the pressure on organisations to improve their environmental, economic and social performance. Hence, the insight of this study cannot be overlooked as it provides owners and managers in SMEs with the understanding of how GSCM practices impact on the performance of their businesses. Secondly, for organisations to survive in today’s highly competitive setting, they have to either change their practices or adapt their strategies to the ever-changing business environment. Given this background, the current study provides green supply chain professionals with adequate knowledge that will enable them to reconfigure their processes and strategies. Last but not least, the research benefits other individuals as well as scholars interested in the field of GSCM by providing them with current information.

Theoretical background

The literature review examines the constructs under consideration in this study (GSCM practices, environmental performance and SCP) as well as the research context (SMEs).

Green supply chain management

Green supply chain management is defined as a strategic capability consisting of strategies, practices and policies that concentrate on managing the environmental impact of supply chain operations (Rauer & Kaufmann 2015). It may also refer to the integration of ecological thinking into supply chain management, including product design, material sourcing and selection, manufacturing process, delivery of the final product to the consumers as well as the end-of-life management of a product after its useful life (Srivastava 2007). These definitions implicitly include an ecosystem philosophy of decreasing externalities (waste and pollution) and materials recovery while still focusing on the economic benefits of environmental responsibility (Griggs et al. 2013; Zhu & Sarkis 2004). For many organisations, GSCM is a way to demonstrate their sincere commitment to sustainability (Bacallan 2000).

Much research on GSCM has focused on the functional areas of supply chain management such as purchasing and supply management (Carter & Dresner 2001; Mollenkopf et al. 2010). However, according to Sarkis (2012), the integration of environmental issues and supply chain management has become a thriving subfield over the past few decades. The potential benefits associated with GSCM include enhanced reputation, increased efficiency, effectiveness, differentiation and revenue growth (Golicic & Smith 2013; Rao & Holt 2005; Wu & Pagell 2011). Furthermore, being ‘green’ is also important from a long-term economic perspective because without natural resources, both business and the consumption of goods are severely stifled (Bell, Mollenkopf & Stolze 2013). Golicic and Smith (2013) found evidence of positive tangible economic and ecological outcomes associated with GSCM practices. Also, according to Lamming and Hampson (1996), GSCM practices can be categorised into green purchasing, eco-design (ED), reverse logistics (RL) and legislation and regulation (LR). The implementation of these practices has an impact on the operations of businesses throughout the supply chain.

Green purchasing

Green purchasing refers to the practice of cooperating with suppliers to develop products that are environmentally sustainable (Carter & Carter 1998; Zhu, Sarkis & Lai 2008). According to Lee (2008), a buying organisation with a GSCM initiative will pay attention to green practices of their suppliers by deploying collaboration-based activities that include training, environmental information sharing and joint research. Other organisations may opt for a less collaborative approach by merely demanding that their suppliers make use of environmental systems such as ISO 14001. External motivators, particularly customer pressure, are key drivers of the adoption of ISO 14001 (Heras-Saizarbitoria, Landin & Molina-Azorin 2011; Vachon & Klassen 2007). Other aspects of green purchasing include the facilitation of recycling, reuse and resource reduction (Diabat & Govindan 2011). There is also evidence that some organisations adopt compliance and evaluative approaches to the green purchasing practices of their suppliers (Large & Thomsen 2011). This involves evaluation of suppliers based on environmental criteria and a requirement for suppliers to develop and maintain some form of the environmental management system (EMS) (Large & Thomsen 2011; Min & Galle 2001; Sarkis 2012; Zhu, Sarkis & Geng 2005). These insights lead to the following hypothesis:

H1: Implementation of green purchasing improves SME environmental performance.


Eco-design is concerned with the design of products that minimise the consumption of materials and energy, which facilitate the reuse, recycle and recovery of component materials and parts, and that avoid or reduce the use of hazardous products within the manufacturing process (Zhu et al. 2008). The importance of ED was identified by Buyukozkan and Cifci (2012) when they revealed that about 80% of product-related effects on the environment emanate from the design. Eco-design practices fall into two main categories: product-related design and packaging-related design. Concerning product design, Min and Galle (2001) suggested that cost-saving opportunities at the beginning of the supply chain tend to be greater and that buying organisations need to seek for opportunities to utilise recycled and reused components actively. However, Wu and Pagell (2011) stressed that the environmental impacts of a product occur at all stages of its life-cycle and identified life-cycle assessment as a commonly used attribute of GSCM.

Building on the theme of life-cycle impacts, Field and Sroufe (2007) noted that one of the sources of recycled materials is post-consumer waste, while Zhu et al. (2005) suggested that it is possible to sell or reuse products or their contents. The implication is that it is important for organisations to ensure that their products comprise contents that can be reused or recycled. With respect to packaging-related ED, a discussion of GSCM practices by Zhu et al. (2005) suggested that organisations and their suppliers should collaborate to ensure that they use green packaging for their products. Other studies have identified elements of green packaging to include ensuring that packaging is reusable and recyclable (Carter & Carter 1998; Large & Thomsen 2011), minimising waste by reducing packaging (Walker, Di Sisto & McBain 2008) and avoidance of hazardous material (Buyukozkan & Cifci 2012). These perspectives invoke the following hypothesis:

H2: Implementation of ED improves SME environmental performance.

Reverse logistics

Reverse logistics refers to a flow of products or goods back from the consumer to an earlier stage of the supply chain (Seroka-Stolka 2014). This is performed for the purpose of recycling, reusing, remanufacturing, repairing, refurbishing or ensuring safe disposal (Carter & Ellram 1998; Younis Sundarakani & Vel 2016). Previous literature indicates that RL activities include product returns and remanufacturing (Olorunniwo & Li 2010), recovery, recycling and reuse (Field & Sroufe 2007) and redistribution (Das 2012). Reverse logistics practices concern final products, their components (Das 2012) and packaging material (Field & Sroufe 2007), which apply to both upstream and downstream of the supply chain (Lau & Wang 2009). Just like other GSCM initiatives, RL plays an important role in enhancing the organisation’s operational efficiency, improves competitiveness and reduces system-wide costs (Lau &Wang 2009). Greening the RL networks is considered a strategic tool as it can provide lucrative economic benefits and improve organisational competitiveness (Buyukozkan & Cifci 2012; Murphy & Poist 2003). Reverse logistics therefore focuses on saving money and adding value to organisational performance by fostering the reuse or resell of materials in order to recover the loss of profits and reduce operational costs (Xie & Breen 2012). These views lead to the following hypothesis:

H3: Implementation of RL improves SME environmental performance.

Legislation and regulatory practices

Legislation and regulatory practices refer to laws, policies and rules that are usually promulgated by government and other regulatory bodies for the purposes of promoting the preservation of the environment (Björklund, Martinsen & Abrahamsson 2012). Both proactive and reactive organisations have developed effective green regulation programmes as a result of government pressure and other regulatory bodies (Chung & Wee 2011; Sheu 2011). Chen and Sheu (2009) suggest that relevant public policies are essential in substantiating the greening of the supply chain. Lu, Wu and Kuo (2007) further assert that many organisations give up their old practices to steadily engage in efforts to green their supply chains in response to stringent LR. These efforts include proactively addressing environmental and social issues in advance of regulation (Zailani et al. 2012). Zhu et al. (2015) stress that regulations and related programmes tend to promote energy efficiency and reduction of pollution. This leads to the following hypothesis:

H4: Adherence to LR improves SME environmental performance.

Environmental performance

Environmental performance may be perceived as the measure of reduction of substances and emissions that reduce environmental impacts caused by business organisations (Kumar, Chattopadhyaya & Sharma 2012). Environmental performance is usually measured in terms of reduction in air emission, energy consumption, hazardous material, material usage and compliance to environmental standards (Zhu, Tian & Sarkis 2012). There has been an upsurge in the environmental awareness of consumers in general, together with a growing number of corporations developing company-wide environmental programmes and green products sourced from markets around the world (Delmas, Nairn-Birch & Lim 2015; Min & Galle 1997; Zobel 2015). Lindenberg and Steg (2007) suggest that some firms pursue ecological initiatives because their primary decision-makers have an innate concern for the environment and want to do as much good for the environment as possible. In these firms, top management is responsible for their environmental management leadership, which idealise rather than rationalise the best course of action (Hoejmose, Brammer & Millington 2012). As such, GSCM is now recognised as a strategy for protecting the environment as well as a source of motivation which focuses on improving employee morale and individual satisfaction (Govindan et al. 2014). Besides, environmental issues have become a source of competitiveness, which also helps to improve efficiency and synergy amongst business partners and enhance environmental presence, minimise waste and achieve cost savings and firm reputation (Rao & Holt 2005). This leads to the following hypothesis:

H5: The better the SME environmental performance, the greater the performance of the supply chain.

Supply chain performance

Supply chain performance is the operational measures that contribute to the improvement of the entire supply chain as a result of collaborative relationships amongst supply chain members (Gagalyuk, Hanf & Hingley 2013; Nyaga et al. 2013; Odongo et al. 2016; Whipple, Lynch & Nyaga 2010). It has also been defined as a systematic process of measuring the effectiveness and efficiency of supply chain operations (Neely, Gregory & Platts 1995). Literature suggests that supply chain relationships create opportunities for firms to experience improved performance (Fynes, de Búrca & Mangan 2008; Wu, Choi & Rungtusanatham 2010). The perceived contribution of a supply chain member to SCP is typically measured using the four constructs of efficiency, responsiveness, quality and supply chain balance. Efficiency is a measure of how well resources are utilised and includes logistics costs and profits (Aramyan et al. 2007). Responsiveness is a measure of speed or rate of providing the requested products and is measured in terms of lead time and customer complaints (Aramyan et al. 2007). Quality consists of products and process quality, with product quality consisting of safety and attractiveness, while process quality is measured by environmental friendliness (Aramyan et al. 2007; Chen & Paulraj 2004; Neely et al. 1995). Supply chain balance is defined as the distribution of risks and benefits as well as supply chain understanding. Thus, SCP promotes collaboration amongst members of the supply chain and ensures continual improvement of effectiveness and efficiency of processes (Anand & Grover 2015; Sundram, Chandran & Bhatti 2016).

Green supply chain management challenges in small and medium scale enterprises

In general, most SMEs are confronted with various challenges that prevent them from engaging in GSCM. Some of these challenges include the lack of financial and human resources, limited innovation capability and limited operational know-how (Abbasi & Nilsson 2012; Wang 2016). As observed by Chin et al. (2012), the majority of SMEs are financially constrained to implement GSCM initiatives and lack formalised organisational structures required to implement GSCM action programmes. A previous study by Preuss (2011) noted that some SMEs are of the view that a formalised corporate structure limits flexibility in decision-making. Also, implementing GSCM requires innovative technological capabilities in the realms of green design, managerial competencies in supplier evaluation and negotiation skills, which are inherently scarce in most SMEs (Mohanty & Prakash 2014). It also requires employee training and development to instil the green corporate culture needed to roll out and sustain GSCM practices (Diabat & Govindan 2011). However, although these challenges may prove overwhelming, GSCM remains a viable strategy in the long term through cost savings and product differentiation (Mohanty & Prakash 2014).

Conceptual model

Figure 1 outlines the conceptual model that directed this study.

FIGURE 1: Conceptual model for green supply chain management, environmental performance and supply chain performance.

Figure 1 shows that the implementation of GSCM practices through green purchasing, ED, RL and legislation and regulatory practices (predictor variables) has a positive influence on the environmental performance (mediating variable), which in turn has a positive impact on SCP (outcome variable).

Research method and design

This section briefly discusses the research design, the sample, instrumentation and data analysis.

A quantitative approach was used because it facilitated the objective measurement of the variables of interest and determining the possible relationships between them (Leedy & Ormrod 2015). The cross-sectional survey design was used to obtain the data needed for statistical testing, as questionnaires were administered once within a specific period to the sample of respondents.


The sample used in this study was composed of 65 SMEs based in Gauteng province. There was no sampling frame in this study as it was difficult to obtain a single list of all SMEs operating in South Africa. In view of this, a non-probability convenience sampling technique was used to select owners and managers of SMEs in Gauteng. The convenience sampling technique considered respondents who were readily available, and who formed part of the target population. To determine the adequacy of the sample size (n = 65) used in this study, two considerations were made. The first was the historical reference technique, which gave reference to previous but similar studies in supply chain management (Huang, Boon & Xiaoming 2015; Lee 2008; Mafini & Muposhi 2017; Younis et al. 2016). These studies used sample sizes ranging between 50 and 600 respondents. The second consideration was to use the standard put forward in a survey conducted by Wolf et al. (2013) that examined sample size requirements for common applied structural equation modelling (SEM). In that study, it was discovered that sample sizes ranging between 30 and 460 respondents produced meaningful patterns of association between parameters. Therefore, the total sample size of n = 65 cases was accepted for data analysis in this study. The profile of the SMEs that participated in the study is presented in Table 1.

TABLE 1: Profile of participating small and medium enterprises.

An analysis of the statistics in Table 1 indicates that manufacturing SMEs were the majority in the sample (64.6%; n = 42), followed by SMEs in the transport and electricity, gas and water industry (10.8%; n = 7) with construction SMEs (6.2%; n = 6) coming third. Further analyses show that 27.7% (n = 18) of participating SMEs employed between 21 and 50 people, while 20.0% (n = 13) employed less than 20 employees. Another 20.0% (n = 13) of the SMEs employed between 51 and 100 people. Concerning annual turnover, 26.2% (n = 17) of the participating SMEs had an annual turnover of between R10 and R20 million, while 24.6% (n = 16) had annual turnovers of less than R10 million. Another 24.6% (n = 16) of SMEs had annual turnovers of less than R50 million.

Data collection and instrumentation

In this study, 95 copies of the survey questionnaire were distributed to owners and managers of SMEs in Gauteng, South Africa in September 2017. A combination of e-mails and the drop and collect method was used in distributing the questionnaires to respondents. Initially, a week was given to respondents to complete the questionnaires. However, this deadline was extended to two weeks as a result of a prolonged return rate of the questionnaires. A confidentiality agreement accompanied each questionnaire to facilitate the data collection. All of the respondents completed the same questionnaire as they represented their respective SMEs. After the data collection process, a total of 67 questionnaires were returned, and 2 were discarded because they had errors. This culminated in 65 questionnaires used in the final data analysis, providing a response rate of 68%. Measurement scales used in the study were operationalised using previous studies. Table 2 shows these questions and their sources.

TABLE 2: Measurement scales and their sources.
Data analysis

To achieve the aim of the study, statistical analyses were performed using the Statistical Packages for Social Sciences (SPSS version 24.0) and the Analysis of Moments Software (AMOS version 24). Relationships between the research constructs were tested using SEM.

Results of the study

This section discusses the use of inferential statistics in this study, confirmatory factor analysis (CFA) results and the outcomes of hypotheses tests.

Inferential statistics

Inferential statistics refer to statistical analyses that allow the researcher to draw inferences about large populations from relatively small samples (Leedy & Ormrod 2015). Inferences are drawn based on tests conducted to determine the relationship between green practices and environmental performance, and the relationship between environmental performance and SCP. A two-way formula recommended by Anderson and Gerbing (1988) was used, which involves performing a CFA followed by testing the proposed research hypotheses utilising the path analysis approach.

Confirmatory factor analysis

A CFA was performed to test the reliability, validity and determine the model-fit requirements. The results of the CFA are presented in Table 3.

TABLE 3: Statistical analysis of accuracy.

The statistical results from Table 3 show that the reliability was ascertained using the Cronbach’s alpha test and the composite reliability (CR). Mitchell and Jolley (1996) suggest that the values of Cronbach’s alpha test that are greater than 0.7 are considered acceptable as they fulfil the requirements of internal consistency. In Table 3, the values of the Cronbach’s alpha test lie between 0.866 and 0.966, which demonstrates that the requirements for internal consistency were met. Regarding the CR test, Fornell and Lacker (1981) assert that the minimum threshold of 0.7 should be attained to confirm the acceptability of the reliability. In this study, the value of CR ranged between 0.84 and 0.95, which confirms that the minimum threshold was attained. Therefore, all measurement scales used for this study were deemed to be reliable.

Convergent validity was determined through factor loadings and average variance extracted (AVE). According to Karatepe (2006), factor loadings greater than 0.5 are deemed to be acceptable. Table 3 shows that the values of factor loadings ranged between 0.637 and 0.942, which implies that the requirements of conversion validity were met. In addition, AVE values were above the recommended cut-off value of 0.5 (Fraering & Minor 2006), which further confirms the adequacy of convergent validity within the scales. To check for discriminant validity, two criteria were used. Firstly, as suggested by Fornell and Larcker (1981), the AVE values for each construct should be higher than the highest shared variance (HSV) for that construct. This parameter was satisfied, as AVE values were higher than the corresponding HSV for all of the constructs. Secondly, correlations between constructs should be below a unit value of 1.0. (Fraering & Minor 2006). As indicated in Table 5, the minimum inter-construct correlation was 0.535. Therefore, discriminant validity was deemed acceptable in this study.

Model-fit analysis

Upon completion of the assessment of reliability and validity, the model-fit assessment was conducted for both CFA and SEM to determine if the data were fitting both the measurement and structural models (Westland 2015). Acceptable model-fit was determined by indices that include the chi-square value over degree of freedom (c2/d.f.) of a value ≤ 3, with the values of goodness-of-fit index (GFI), comparative fit index (CFI), incremental fit index (IFI) and Tucker–Lewis index (TLI) equal or greater than 0.90, and the root mean square error of approximation (RMSEA) value to be equal to or less than 0.08. Table 4 provides the results of the model-fit analysis.

TABLE 4: Model-fit statistics.

The analysis of the results in Table 4 shows that the model-fit for both CFA and SEM were acceptable as they satisfied the suggested thresholds for each indicator.

Table 5 displays the correlation between constructs.

TABLE 5: Correlations between constructs.
Hypotheses tests

Model-fit analysis for the structural model revealed that all model fits were within the acceptable range and are as follows: (d/f) = 2.476; (IFI) = 0.940; (TLI) = 0.915; (CFI) = 0.937; (NFI) = 0.931; and (RMSEA) = 0.052. Individual hypotheses test results are presented in Table 6. The study tested hypotheses using the path analysis procedure. The results are reported in Table 6.

TABLE 6: Results of path analysis.

The path coefficients of the proposed hypotheses (H1, H2, H3, H4 and H5) are as follows: 0.116; −0.006; 0.390; 0.721; and 0.611, respectively. Except for H1 and H2, all of the other path coefficients were significant at a confidence level of 0.001. This implies that the results from H1 and H2 do not support the proposed research hypotheses, while H3, H4 and H5 support them.


The results in Table 6 show that three hypotheses (H3, H4 and H5) were supported, while two hypotheses (H1 and H2) were not supported.

Green purchasing and environmental performance

The first hypothesis (H1) of the study suggested that the implementation of GP leads to improved SME environmental performance. This hypothesis was not supported in this study because it showed statistical insignificance and an almost negligible positive relationship (β = 0.116; p = 0.168). This result implies that there is no relationship between GP and environmental performance. It contradicts previous studies (Carter & Ellram 1998; Min & Galle 2001) where positive relationships between GP and environmental performance were observed. However, the results of the study are supported by a survey conducted by Large and Thomsen (2011), which found no relationship between GP and environmental performance. The results of this study could be attributed to the inability of SMEs in South Africa to incorporate green practices into their organisational strategy and, hence, they cannot pursue the route of sustainability during purchases. Furthermore, engaging in green initiatives requires substantial capital investments that SMEs usually do not possess. This lack of financial resources may limit their affordability. The results could also be attributed to the view that the owners and managers in SMEs are yet to familiarise themselves with the benefits of implementing green practices. It could further be that SMEs do not have trained and experienced personnel committed to green initiatives and, hence, they are yet to realise the importance of these initiatives.

Eco-design and environmental performance

The second hypothesis (H2) suggested that the implementation of ED leads to improved SME environmental performance. This hypothesis was not supported in this study as there was a negative and insignificant relationship between ED and environmental performance (β = −0.006; p = 0.946). These results challenge previous studies conducted by Laosirihongthong et al. (2013) who assert that there is a positive relationship between ED and environmental performance. However, the present study finds support in previous studies (Montabon, Sroufe & Narasimhan 2007; Richey et al. 2005) where evidence of a negative relationship between ED and environmental performance was found. The results of the current study could be attributed to the view that ED is too costly to implement, making it difficult for SMEs to consider it in their operations. This is because the implementation of ED requires expensive technologies coupled with extensive research and development processes, many of which are beyond the capacity of South African SMEs. For the few SMEs that have adequate financial resources, it could be that they perceive that ED is impractical for them to adopt or they merely fail to foresee any gain in implementing it.

Reverse logistics and environmental performance

The third hypothesis (H3) suggested that the implementation of RL leads to improved SME environmental performance. The hypothesis was supported in this study as the results revealed a moderate, positive and significant relationship between RL and environmental performance (β = 0.390; p = 0.000). A previous study conducted by Diabat, Khodaverdi and Olfat (2013) to explore the relationship between RL and environmental performance found that RL positively impacts environmental performance. This moderate relationship observed in the current study may imply that some SMEs perceive RL to be very expensive to implement. It could also be that some SMEs do not understand precisely the role of recycling in the success of their businesses or they have just decided to discard RL practices and are more inclined to other green practices. Lau and Wang (2009), in their study, found that the embracing of RL is often negatively affected by the lack of law enforcement, high costs and low public awareness on environmental sustainability. This study suggests that these adverse factors may also apply to SMEs in South Africa.

Legislation and regulation and environmental performance

The fourth hypothesis (H4) suggested that adherence to LR leads to higher SME environmental performance. This hypothesis was supported in this study, as justified by the strong positive and significant relationship between the two variables (β = 0.721; p = 0.000). This implies that government-imposed LR contribute to improving the environmental performance of SMEs. A study conducted by Laosirihongthong et al. (2013) supports this result as it also reached a similar conclusion. Perhaps, the respect for environmental regulations could be attributed to the fear of consequences related to non-compliance. This study suggests that to hedge themselves against reprisals by the long arm of the law, SMEs implement defensive and reactional strategies through their adherence to existing environmental laws. Adherence to these laws leads to better environmental performance. It is also noteworthy that LR scored the highest beta when compared to the other GSCM practices. This top beta score confirms the high level of importance that SMEs attach to LR regarding the pollution of the environment.

Environmental performance and supply chain performance

The fifth hypothesis (H5) suggested that the better the SME environmental performance, the higher the performance of the supply chain. A strong positive and significant relationship between these two constructs was observed (β = 0.611; p = 0.000) to support the hypothesis. This result corresponds with previous studies (Green, Whitten & Inman 2011; Vachon & Klassen 2007) which suggest that integrating environmental sustainability into organisational strategy positively impacts on the performance of the supply chain. This result may imply that SMEs understand the benefits of environmental performance and are willing to manipulate this positive effect to stimulate the performance of the supply chain. In the view of these results, it is confirmed that embracing environmental sustainability leads to improved SCP.

A comprehensive green supply chain management model

Figure 2 is the resultant structural model of the relationships between GSCM, environmental performance and supply chain performance.

FIGURE 2: Structural model for green supply chain management practices, environmental performance and supply chain performance.

The comprehensive structural model shows the extent of the relationships between the constructs related to this study as well as the factor loadings for each item in the constructs. Green purchase (GP) practices have a positive but weak and insignificant relationship with environmental performance (r = 0.12; p = 0.168). Eco-design has a negative and insignificant relationship with environmental performance (r = −0.01; p = 0.946). Reverse logistics has a positive and significant relationship with environmental performance (r = 0.39; p = 0.000). Legislation and regulation have a strong positive and significant relationship with environmental performance (r = 0.72; p = 0.000). Finally, environment performance and supply chain performance have a strong positive and significant connection (r = 0.72; p = 0.000). A glance at this model demonstrates that legislation and regulatory practices have the highest influence on environmental performance (r = 0.72).

Conclusions and managerial implications

This study aimed to analyse the relationship between GSCM practices, environmental performance and SCP amongst SMEs. Data were collected from 65 SMEs that were based in the Gauteng province of South Africa. The first part of the statistical analyses tested the relationship between environmental performance and four GSCM practices, namely GP, ED, RL and LR. The study revealed that there was no significant relationship between environmental performance and two GSCM practices, namely GP and ED. However, positive and significant relationships were established between environmental performance and two GSCM practices, namely RL and LR. The second part of the statistical analyses tested the relationship between environmental performance and SCP. The result of that analysis yielded a positive and significant relationship between the two factors. The study, therefore, concludes that although literature confirms the positive contribution of GSCM to environmental performance, the reality is that in SME supply chains it is necessary to ascertain the exact relationship between specific GSCM sub-dimensions and the intended performance outcome. In this case, only the implementation of RL and adherence to LR by SMEs can lead to positive results realisable through increases in both environmental and SCP.

The present study has managerial implications, which are focused on how GSCM practices can be harnessed for the improvement of performance in SMEs. Businesses within the SME sector should evaluate their suppliers based on environmental criteria and encourage them to develop and maintain some form of the EMS. In this regard, it is important to engage those suppliers that have ISO 14001 certification only, which ensures that these suppliers have a concern for the environment in their operations. Moreover, SMEs should still endeavour to design products that reduce the consumption of materials and energy, and facilitate the reuse, recycling and recovery of materials and parts. Investments in innovative RL technology should be encouraged amongst SMEs and they should consider outsourcing where there is lack of competency. It is further essential that SMEs create synergy with customers to recover all used products for recycling. Effective green regulation programmes can be developed by SMEs, which should also apply effort in complying with relevant public policies. Environmental and social issues should be addressed proactively in advance of regulation.

Limitations and implications for further research

Limitations should be highlighted so that other research orientations can be explored. This study was limited only to SMEs in Gauteng province, South Africa, and respondents were drawn from 65 business organisations. For quantitative descriptive research, this sample size was not large enough to facilitate the generalisation of the results to other environments. The study was further limited in its use of convenience sampling to select participating SMEs, which may have led to sampling bias. However, appropriate actions were taken to minimise sampling bias as the participating SMEs were selected from different locations across Gauteng.

Green practices in this study were limited to GP, ED, RL and LR dimensions. Other dimensions of the GSCM practices should be explored in future studies. Future research should consider having larger sample sizes to maximise the validity and reliability of the study. Similar studies can also be conducted in other provinces of South Africa and across the African continent.


The authors thank the SMEs that participated in this study for their input and the Graduate School of Business Leadership at University of South Africa (UNISA) for granting the permission to conduct the study.

Competing interests

The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this article.

Authors’ contributions

L.R.E. did the literature review and collected the data, while C.M. performed the data analysis and compiled the sections of the article.


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