Improved multi‐criteria group decision‐making method considering hesitant fuzzy preference relations with self‐confidence behaviours for environmental pollution emergency response process evaluation

Abstract

AbstractEnvironmental pollution is one of the major challenges in China, which seriously affects people's life, economy and society. This paper proposes a multi‐criteria group decision‐making method based on hesitant fuzzy preference relations with self‐confidence (HFPRs‐SC) behaviours and applies it to the evaluation of the environmental pollution emergency response process. Firstly, a comprehensive evaluation system is proposed that covers the environmental pollution emergency response process. Moreover, is utilized to obtain the normalized hesitant fuzzy preference relationship, and an algorithm that considers both the hesitant fuzzy preference value and the self‐confidence level is proposed to improve the consistency of HFPRs‐SC. In addition, combined with subjective and objective weights of experts, a weighted average operator based on the confidence level is applied to aggregate individual HFPR‐SC. Furthermore, the score function of HFPRs‐SC is designed to get the best ranking. Finally, a case study on an explosion accident in Fujian Province of China is conducted to verify the practicability and effectiveness of the proposed method with comparative analysis and sensitivity analysis. Based on the analysis, some suggestions are put forward for improving environmental pollution emergency response.