Developing a benchmark for supplier code of conducts – lessons learned from Bayer’s journey towards sustainable procurement and research opportunities

Purpose Supplier codes of conduct are amongst the most widely used practices in sustainable procurement programs. While there are limitations and risks involved in using supplier codes of conduct (including the risk of greenwashing, a weak link to action and the inability of supplier to comply), there is only a modest amount of research on the topic, other than content analysis. We aim to contribute to research both lessons learned, over a two-decade period, about the implementation and use of a supplier code of conduct from a case study, as well as, to suggest further research that can support the industry and enrich insight into the effective adoption of supply codes of conduct. Design/methodology/approach Thanks to the support of our co-author from Bayer we are able to share lessons learned by the global procurement team of Bayer and use these as a basis for suggesting questions for further research. The approach of this paper centres on the adoption and implementation of the supplier code of conduct in an effort to complement existing research on supplier codes of conduct that is largely focused on code of conduct content, less on the implementation of codes of conduct. The collaboration with our co-author from Bayer enables direct access to experiences and managerial perspectives. By considering the two-decade journey towards more sustainable supply chain management at Bayer, we are able to achieve a longitudinal perspective on adoption and implementation aspects. Findings Bayer ensures personal and community engagement in its sustainable procurement program in order to drive action and improve decision making along the value chains. The company regularly updates its code of conduct to stay aligned with its maturity and complements the code of conduct with a continuous improvement focus, supported by both generic and industry-specific consortia. The company has not yet been able to establish direct visibility into the conduct of tier 2 and up suppliers. Originality/value This paper helps close a gap in the literature and provides input into industry efforts in one of the most widely used practices in sustainable procurement. We hope that the research questions that we developed based on the first 20+ years of Bayer’s learning journey towards sustainable procurement will inspire research that can impact industry efforts towards creating a more sustainable future.