In light of the rising global importance of sustainable procurement (SP) implementation for contributing to sustainable development goals (SDGs), the main aim of this study is to perform an abductive research to analyse the drivers of SP under a Danish extended multi-tier supply chain context. Initially, the expansion of the traditional multi-tier theory to a novel extended multi-tier theory is accomplished by considering three factors: any number of upstream SC entities, the direct customer on the downstream entity, and the focal firm. This study has been done with the intention of implementing SP for the focal firm. Following that, the study develops a research framework to analyse the drivers of SP in an extended multi-tier environment by considering both upstream (1st tier and 2nd tier suppliers) and downstream (direct customer) supply chain entities together with the focal company using multiple theories such as extended multi-tier, triple bottom line (TBL), dynamic capability, institutional theory, and decision theory. Firstly, the relevant SP drivers are categorised (i.e., 7 categories of main drivers and 24 sub-drivers) based on the TBL, dynamic capability, and institutional theory. Secondly, applying the Best Worst Method (BWM), SP drivers were prioritized, and a comparative analysis was performed across the extended multi-tier context. The result shows that the top three priorities of the sub-drivers are “personal values,” “active top management support,” and “government regulation and legislation,” respectively for the focal company. Comparative analysis points to the fact that the sub-driver “government regulation and legislation” is considered important for all the SC entities; however, no mandatory government regulation currently exists to implement SP in the private sector context. On the other hand, the sub-driver “customer pressure / demand” for the sustainable products has been a low priority for the focal company and 2nd tier suppliers and it has not been considered relevant for the 1st tier supplier and direct customer. Thirdly, applying the Decision-Making Trial And Evaluation Laboratory (DEMATEL), an interrelationship analysis was performed on the key SP drivers that exist from the focal company’s perspective. Finally, relevant managerial implications and conclusions were drawn for the focal case company based on the results of the prioritization and interrelationship analysis.

鉴于可持续采购（SP）实施对促进可持续发展目标（SDG）的全球重要性日益提高，因此本研究的主要目的是进行归纳研究，以分析丹麦扩展多层供应下SP的驱动因素链上下文。最初，将传统的多层理论扩展为新颖的扩展多层理论是通过考虑以下三个因素来实现的：任意数量的上游SC实体，下游实体的直接客户以及重点公司。进行这项研究的目的是为焦点公司实施SP。跟随那个，该研究开发了一个研究框架，通过考虑上游（第一层和第二层供应商）和下游（直接客户）供应链实体以及重点公司，使用多种理论，分析了扩展多层环境中的SP驱动因素。扩展的多层，三重底线（TBL），动态能力，制度理论和决策理论。首先，基于TBL，动态能力和制度理论对相关的SP驱动因素进行了分类（即7个主要驱动因素和24个子驱动因素）。其次，应用最佳最差方法（BWM），对SP驱动程序进行了优先排序，并在扩展的多层环境中进行了比较分析。结果表明，子驱动程序的前三个优先级是“ 基于TBL，动态能力和制度理论的7个主要驱动因素和24个辅助驱动因素）。其次，应用最佳最差方法（BWM），对SP驱动程序进行了优先排序，并在扩展的多层环境中进行了比较分析。结果表明，子驱动程序的前三个优先级是“ 基于TBL，动态能力和制度理论的7个主要驱动因素和24个辅助驱动因素）。其次，应用最佳最差方法（BWM），对SP驱动程序进行了优先排序，并在扩展的多层环境中进行了比较分析。结果表明，子驱动程序的前三个优先级是“焦点公司的个人价值观， “积极的高层管理人员支持”和“政府法规和立法”。比较分析指出以下事实：对所有可持续发展实体而言，“政府法规和立法”是次级驱动因素；但是，目前不存在强制性的政府法规来在私营部门中实施SP。另一方面，副驾驶员“客户压力/需求对于可持续性产品，对于重点公司和第二级供应商而言，它一直是低优先级，并且尚未被视为与第一级供应商和直接客户相关。第三，应用决策审判和评估实验室（DEMATEL），从焦点公司的角度对存在的主要SP驱动因素进行了相互关系分析。最后，根据优先级排序和相互关系分析的结果，得出了焦点案例公司的相关管理含义和结论。