This study explores the critical determinants of environmentally oriented public procurement in Singapore, and investigates the causal relationships among the determinants that influence this procurement. Using the extant literature and basing our examination on natural-resource-based theory, we develop a conceptual framework for the implementation of environmentally oriented public procurement using three high-level dimensions and ten determinants. Sixteen interviews were conducted with 16 senior executives working in various ministries and statutory boards in Singapore who are closely involved in the public-procurement process. The decision-making trial and evaluation laboratory (DEMATEL) method, which is a multicriteria decision-making tool, is employed to analyse the interview data and information. The results of the analysis reveal that the two most critical determinants for environmentally oriented public procurement in Singapore are energy-efficiency strategy and environmental standards. These two determinants were also found to be the primary drivers of the implementation of environmentally oriented public procurement in Singapore. Through further analysis using the level of influence, a cognition map is developed to illustrate the relationships among the ten determinants. Understanding the dynamic nature of public procurement through these causal relationships is essential for the formulation of environmentally oriented public procurement implementation strategies.

这项研究探讨了新加坡以环境为导向的公共采购的关键决定因素，并研究了影响该采购的决定因素之间的因果关系。使用现有文献并基于自然资源理论进行考察，我们使用三个高层次的维度和十个决定因素为实现面向环境的公共采购开发了一个概念框架。与16个在新加坡各部委和法定委员会工作的高级管理人员进行了16次访谈，他们紧密参与了公共采购流程。决策试验和评估实验室（DEMATEL）方法是一种多准则决策工具，用于分析访谈数据和信息。分析结果表明，新加坡以环境为导向的公共采购的两个最关键的决定因素是能效战略和环境标准。还发现这两个决定因素是新加坡实施以环境为导向的公共采购的主要驱动力。通过使用影响程度的进一步分析，开发了一个认知图来说明十个决定因素之间的关系。通过这些因果关系了解公共采购的动态性质对于制定面向环境的公共采购实施策略至关重要。还发现这两个决定因素是新加坡实施以环境为导向的公共采购的主要驱动力。通过使用影响程度的进一步分析，开发了一个认知图来说明十个决定因素之间的关系。通过这些因果关系了解公共采购的动态性质对于制定面向环境的公共采购实施策略至关重要。还发现这两个决定因素是新加坡实施以环境为导向的公共采购的主要驱动力。通过使用影响程度的进一步分析，开发了一个认知图来说明十个决定因素之间的关系。通过这些因果关系了解公共采购的动态性质对于制定面向环境的公共采购实施策略至关重要。