The green supplier selection could be regarded as a classical multiple attribute group decision making (MAGDM) issue. The interval-valued Pythagorean fuzzy set (IVPFSs) can fully describe the uncertain information for the risk assessment of science and technology projects. Furthermore, the classical TODIM method based on the cumulative prospect theory (CPT-TODIM) is built, which is a selectable method in reflecting the decision makers’ psychological behavior. Thus, in this paper, the interval-valued Pythagorean fuzzy CPT-TODIM (IVPF-CPT-TODIM) method is proposed for MAGDM issue. At the same time, it is enhancing rationality to get the weight information of attributes by using the entropy weight method under IVPFSs. And focusing on hot issues in contemporary society, this article applies the discussed method to green supplier selection, and demonstrates risk assessment model of science and technology projects based on the IVPF-CPT-TODIM method. Finally, through comparing the outcome of comparative analysis, we conclude that this improved approach is acceptable.

绿色供应商的选择可以视为经典的多属性组决策（MAGDM）问题。区间值勾股模糊集（IVPFS）可以充分描述不确定性信息，用于科技项目的风险评估。此外，建立了基于累积前景理论的经典TODIM方法（CPT-TODIM），它是反映决策者心理行为的一种可选方法。因此，本文针对MAGDM问题提出了区间值勾股模糊CPT-TODIM（IVPF-CPT-TODIM）方法。同时，在IVPFSs下使用熵权法来获取属性的权重信息正在增强合理性。重点关注当代社会的热点问题，本文将讨论的方法应用于绿色供应商的选择，并基于IVPF-CPT-TODIM方法论证了科技项目的风险评估模型。最后，通过比较比较分析的结果，我们得出结论，这种改进的方法是可以接受的。