关键词: 故障模式与影响分析, 直觉模糊数, 直觉模糊全乘比例分析多目标优化, 直觉模糊优先级加权平均算子, 风险评估

Abstract: With respect to the problems of uncertainty evaluation information,unknown risk factor weights and unreasonable risk priority number model in traditional Failure Mode and Effects Analysis (FMEA) method,an improved FMEA method based on intuitionistic fuzzy MOORA plus full multiplicative form (IF-MULTIMOORA) was proposed.The linguistic variables which could be transformed into intuitionistic fuzzy numbers were used to represent evaluation information of failure modes and risk factor weights.The intuitionistic fuzzy weighted average operator was utilized to aggregate the experts' evaluation information of different priority level.Comprehensive weighting method was developed based on expert evaluation method and deviation maximization model method to determine risk factor weights.The intuitionistic fuzzy aggregation operators and improved Hamming distance were introduced to improve the MULTIMOORA approach,and then the risk ranking of failure modes was determined.A case study of railway line maintenance system was provided to illustrate the validity and rationality of the proposed method．

Key words: failure mode and effects analysis, intuitionistic fuzzy number, intuitionistic fuzzy MOORA plus full multiplicative form, intuitionistic fuzzy weighted average operator, risk evaluation