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Implementing sustainable practices in multi-tier supply chains (MTSCs) is a difficult task. This study aims to investigate why such endeavours fail and how MTSC partners can address them.

A single-case study of a global food retail company was used in this study. Semi-structured interviews with the case firm and its first- and second-tier suppliers were used to collect data, which were then qualitatively analysed using thematic analysis.

Major barriers impeding the implementation of sustainability in multi-tier food supply chains were revealed such as the cost of sustainability, knowledge gap, lack of infrastructure and supply chain complexity. Furthermore, the findings reveal five possible solutions such as multi-tier collaboration and partnership, diffusion of innovation along the chain, supply chain mapping, sustainability performance measurement and capacity building, all of which can aid in the improvement of sustainability practices.

Future research should investigate how specific barriers and drivers affect specific aspects of sustainability, pointing practitioners to specific links between the variables that can aid in tailoring sustainability oriented investment.

This research supports managerial comprehension of MTSC sustainability, pointing out ways to improve sustainability performance despite the complex multi-tier system of food supply chains.

The research on MTSC sustainability is still growing, and this research contributes to the debate about how MTSCs can become more sustainable from the perspective of the triple bottom line, particularly food supply chains which face significant sustainability challenges.

The purpose of this paper is to understand how supply chain actors in an Italian cashmere supply chain reacted to dependence and power use during the Covid-19 crisis and how this affected their perceptions of justice.

The research took a case study approach exploring issues of dependence, power and justice in a multi-tier luxury cashmere supply chain.

The authors found two types of dependence: Craftmanship-induced buyer dependence and Market-position-induced supplier dependence. The authors also identified four key archetypes emerging from the dynamics of dependence, power and justice during Covid-19. In the repressive archetype, buying firms perceive their suppliers as dependent and use mediated power through coercive tactics, leading the suppliers to perceive interactional, procedural and distributive injustice and use reciprocal coercive tactics against the buying firms in the form of coopetition. In the restrictive archetype, buying firms that are aware of their dependence on their suppliers use mediated power through contracts, with suppliers perceiving distributive injustice and developing ways to circumvent the brands. In the relational archetype, the awareness of craftmanship-induced buyer dependence leads buying firms to use non-mediated power through collaboration, but suppliers still do not perceive distributive justice, as there is no business security or future orders. In the resilient archetype, buying firms are aware of their own craftmanship-induced dependence and combine mediated and non-mediated power by giving the suppliers sustainable orders, which leads suppliers to perceive each justice type positively.

This paper shows how the actors in a specific supply chain react to and cope with one of the worst health crises in living memory, thereby providing advice for supply chain management in future crises.

Although the number of studies that investigate supply chain sustainability learning has increased, little is known about the way sub-suppliers build knowledge and learn sustainability practices. Thus, moving beyond merely investigating the accumulation of knowledge, this research explores sub-suppliers’ knowing that supports the learning of sustainability practices in a multi-tiered food supply chain.

In the conduct of this interpretive research in South Brazil, two ethnographies were completed during 74 days of observations to understand similarities and differences between certified and non-certified sub-suppliers with respect to sustainability practices. As part of our research conducted in the context of poultry production, secondary data and data gathered through semi-structured interviews with representatives of the buyer and first-tier supplier firms were used to provide a better comprehension of the multi-tiered supply chain context. Then, we executed an interpretive textual analysis.

Our investigation explored six vignettes to reveal ways of learning sustainability practices in terms of waste management, biosecurity and animal welfare. Although the buyer firm requested these practices, we noted that the first-tier supplier was responsible for translating the practices to sub-suppliers. Moreover, we found that sustainability learning was shaped by the sub-supplier context embodied in knowledge through knowing. The ways of learning were related to sharing knowledge between experts and novices with the support of material practices; however, knowledge was also gained by unlearning some knowledge shared by the supplier. Sustainability practice learning, thus, was performed in a space of learning via knowledge creation among practitioners.

Recognising how sustainability learning happens in a multi-tiered supply chain context can help managers to develop plans to implement sustainability practices that will broaden their sustainability knowledge.

Unlike previous studies on supply chain sustainability learning, we reveal ways that sustainability practices emerge from knowledge that results from sub-suppliers’ knowing. We also explain how unlearning can consciously occur in several situations of sustainability learning.

The purpose of this paper is to develop a comprehensive framework that synthesizes approaches and contingency variables to manage the sustainability of multi-tier supply chains and sub-suppliers.

Using a systematic literature review, the authors analyse 39 studies and relevant theories to develop a comprehensive framework that integrates research efforts so far.

The authors build a conceptual framework that incorporates four approaches to manage the sustainability of multi-tier supply chains. They also identify several contingency variables (e.g. power, dependency, distance, industry, knowledge resources) and their effect on the proposed approaches.

Based on the framework, six research propositions that advance the theories on multi-tier supply chain management, allow lead firms to develop comprehensive sustainable supply chain strategies and set the ground for future research in the area were developed.

This study provides a novel framework for studying sustainability in multi-tier supply chains that goes beyond the single-tier perspective and incorporates the extended supply chain.

Based on the emerging view of supply chains as complex adaptive systems, this paper aims to build and test an analytical model for resilience assessment surrounding supply chain risks at the level of the supply chain system and its individual tiers.

To address the purpose of this study, a multimethod research approach is adopted as follows: first, data envelopment analysis (DEA) modelling and fuzzy set theory are used to build a fuzzy network DEA model to assess risk resilience of the overall supply chains and their individual tiers; next, the proposed model is tested using a survey of 150 middle- and top-level managers representing nine industry sectors in Iran.

The survey results show a substantial variation in resilience ratings between the overall supply chains characterizing nine industry sectors in Iran and their individual tiers (upstream, downstream and organizational processes). The findings indicate that the system-wide characteristic of resilience of the overall supply chain is not necessarily indicative of the resilience of its individual tiers.

High efficiency scores of a number of tiers forming a supply chain are shown to have only a limited effect on the overall efficiency score of the resulting supply chain. Overall, our research findings confirm the necessity of adopting both the system-wide and tier-specific approach by analysts and decision makers when assessing supply chain resilience. Integrated as part of risk response and mitigation process, the information obtained through such analytical approach ensures timely identification and mitigation of major sources of risk in the supply chains.

Supply chain resilience assessment models rarely consider resilience to risks at the level of individual supply chain tiers, focusing instead on the system-wide characteristics of supply chain resilience. The proposed analytical model allows for the assessment of supply chain resilience among individual tiers for a wide range of supply chain risks categorized as upstream, downstream, organizational, network and external.

A firm's ability to cascade sustainability requirements further down to lower-tier suppliers might be affected by inter-firm power relations. This study aimed to identify the power sources of focal firms and first- and lower-tier suppliers and to investigate how they may affect their ability to cascade sustainability requirements along multi-tier supply chains.

A multiple case study of 24 companies was conducted to investigate the sources of power in multi-tier supply chains. In total, 42 informants from five focal companies, ten first-tier suppliers and nine lower-tier suppliers were interviewed.

Differences were found between the sources from which focal firms and first- and lower-tier suppliers drew power. Findings revealed that firms' power sources may increase or impair their ability to cascade sustainability requirements to lower supply chain tiers. Furthermore, multi-tier supply chain-level power sources constitute a significant determinant of firms' ability to disseminate sustainability requirements to lower-tier suppliers.

The results can help companies and purchasing managers understand how their own and suppliers' power may affect their ability to cascade sustainability agendas to lower-tier suppliers. In particular, the results can be useful for supplier selection and the development of supplier relationship management strategies for fostering sustainability in multi-tier supply chains.

This study places traditional power perspectives in the context of multi-tier sustainable supply chain management, broadening the view beyond dyadic relationships that have traditionally been the focus of the supply management literature.

Multi-tier supply chain risk management (MSCRM) is an evolving and dynamic field, as any defaults or glitches in supply chains can potentially harm the efficiency and competitiveness of the entire supply chain. This study aims to investigate barriers to MSCRM in the automotive and civil aircraft industries.

This study adopts an inductive case study research design. The case analysis includes two parts. First, the within-case analysis develops case profiles and identifies critical categories. Second, the cross-case analysis compares MSCRM patterns across the cases.

This study argues that narrow information sharing and communication covering only the immediate supply chain partners obstruct the efficiency of MSCRM. Similarly, high dependency on strategic alliances with suppliers hinders efficient MSCRM. Additionally, relying on information and communication technologies (ICT) increases companies' exposure to risks and poses another barrier to efficient MSCRM.

Further research should be pursued to expand generalizability and test the validity of the findings using other forms of data collection and methodologies, such as large-scale surveys, experiments or secondary data across different sectors and typical supply networks.

This study provides empirical evidence on the obstacles faced by companies during the process of MSCRM. These findings can guide practitioners in developing initiatives to overcome these challenges.

This study is among the first to investigate the barriers to MSCRM in the automotive and civil aircraft industries using in-depth case studies across three tiers of the supply chain.

The purpose of this paper is to illustrate how a focal firm can manage sustainability in its lower-tier suppliers which lie beyond the firm’s visible horizon.

This paper presents a new approach to managing sustainability in multi-tier supply chains with an illustrative case study that analyzes how electronic equipment firms make efforts to verify that they are not using conflict minerals.

The nexus supplier (smelters in the electronics supply chain) plays a relevant role in increasing visibility and tracing the source of minerals, thus guaranteeing sustainability upstream in the supply chain.

The paper is based on a specific supply chain (i.e. electronics supply chain) and therefore its conclusions might be only partially generalized to other sectors.

Firms in complex supply chains need to make efforts to identify and manage nexus suppliers to extend sustainability upstream in the supply chain, especially beyond their visible horizon.

The paper focuses on management of sustainability in the invisible zone of the supply chain, which has been neglected in previous literature and is increasingly important to the managerial world in an economy with a growing number of global supply chains.

The purpose of this paper is to examine how first-tier suppliers in multi-tier supply chains adapt their vertical and horizontal relationships to reduce the risk of slavery-like practices.

Using Archer’s morphogenetic theory as an analytical lens, this paper presents case analyses adduced from primary and secondary data related to the development of relational anti-slavery supply capabilities in Brazilian–UK beef and timber supply chains.

Four distinct types of adaptation were found among first-tier suppliers: horizontal systemisation, vertical systemisation, horizontal transformation and vertical differentiation.

This study draws attention to the socially situated nature of corporate action, moving beyond the rationalistic discourse that underpins existing research studies of multi-tier, socially sustainable, supply chain management. Cross-sector comparison highlights sub-country and intra-sectoral differences in both institutional setting and the approaches and outcomes of individual corporate actors’ initiatives. Sustainable supply chain management theorists would do well to seek out those institutional entrepreneurs who actively reshape the institutional conditions within which they find themselves situated.

Practitioners may benefit from adopting a structured approach to the analysis of the necessary or contingent complementarities between their, primarily economic, objectives and the social sustainability goals of other, potential, organizational partners.

A range of interventions that may serve to reduce the risk of slavery-like practices in global commodity chains are presented.

This paper presents a novel analysis of qualitative empirical data and extends understanding of the agential role played by first-tier suppliers in global, multi-tier, commodity, supply chains.

The purpose of this paper is to explore how multinational corporations (MNCs) orchestrate internal and external resources to help their multi-tier supply chains learn sustainability-related knowledge.

An exploratory multiple case study approach was adopted and three MNCs’ sustainable initiatives in China were examined. The data were primarily collected through 43 semi-structured interviews with managers of focal companies and their multi-tier suppliers.

The authors found that in order to facilitate their supply chains to learn sustainability, MNCs tend to orchestrate in breadth by internally setting up new functional departments and externally working with third parties, and orchestrate in depth working directly with their extreme upstream suppliers adopting varied governance mechanisms on lower-tier suppliers along the project lifecycle. The resource orchestration in breadth and depth and along the project lifecycle results in changes of supply chain structure.

The proposed conceptual model provides an overall framework for companies to design and implement their multi-tier sustainable initiatives. Companies could learn from the suggested learning stages and the best practices of case companies.

The authors extend and enrich resource orchestration perspective (ROP), which is internally focused, to a supply chain level, and answer a theoretical question of how MNCs orchestrate their internal and external resources to help their supply chains to learn sustainability. The extension of ROP refutes the resource dependence theory, which adopts a passive approach of relying on external suppliers and proposes that MNCs should proactively work with internal and external stakeholders to learn sustainability.