A new multidimensional process type FMEA approach: Defense and aerospace industry application

Abstract

Failure Modes and Effects Analysis (FMEA) is a powerful risk assessment tool, however it needs to be developed due to many weaknesses. In this study, in order to increase the efficiency of using FMEA; a new multidimensional process type FMEA (MDPT-FMEA) approach is proposed. The MDPT-FMEA approach consists of three stages. In the first stage; Entropy, Preference Selection Index (PSI) and Criteria Importance through Intercriteria Correlation (CRITIC) methods were used to weight the risk criteria (RC). Different RC weights obtained from these three different weighting methods were combined using the geometric mean operator and integrated RC weights were calculated. In the second stage, Evaluation based on Distance from Average Solution (EDAS), Combinative Distance-based Assessment (CODAS), Complex Proportional Evaluation (COPRAS) methods were used together with integrated RC weights to determine the priority of each failure mode (FM). In the third step, the different FM priorities obtained from the three different ranking methods in question were combined using the Technique of Precise Order Preference (TPOP). By calculating the Spearman Rank Correlation Coefficient for different RC rankings and FM rankings obtained as a result of the study; the final weights and final rankings obtained are discussed in terms of their validity. In this study, unlike the literature; perspectives of different weighting and ranking methods are reflected in RC weights and FM rankings in FMEA. With the proposed MDPTFMEA approach, process-based FMs were evaluated in a company operating in the defense and aerospace industry.