Computer Science ›› 2016, Vol. 43 ›› Issue (Z11): 362-367.doi: 10.11896/j.issn.1002-137X.2016.11A.084

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FMEA Method Combining OWA Operator and Fuzzy DEMATEL

LIN Xiao-hua and JIA Wen-hua   

  • Online:2018-12-01 Published:2018-12-01

Abstract: Considering the shortcomings of traditional failure mode and effect analysis(FMEA) method in practical application,a risk ranking method was proposed based on ordered weighted averaging(OWA) operator and decision ma-king trial and evaluation method(DEMATEL).FMEA experts make fuzzy evaluation on the three risk factors of the fai-lure modes,and the evaluation information is aggregated by OWA operator to get the influence degree of the failure cause to failure mode.The initial direct-relation fuzzy matrix of the FMEA system is constructed by using fuzzy DEMATEL method,then the total-relation fuzzy matrix is calculated,and the reason degree of each failure cause is computed,based on which the product or system risk assessment is conducted.The proposed method is applied to safety analysis of the basic components of the metro car door system,and the feasibility and effectiveness of the method is verified by comparing with the results of the traditional RPN method.

Key words: Failure mode and effect analysis(FMEA),Risk assessment,Fuzzy number,OWA operator,DEMATEL method

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