Selecting the optimal maintenance policy using fuzzy EDAS multi-criteria decision making

This paper provides a practical method to collect the opinion and experience of experts and use them to make decisions in the field of choosing the best options for maintenance and repairs. In the proposed method, first, the opinions of experts are collected and aggregated, and using the basics of failure modes and effects analysis (FMEA), this information is summarized and expressed in the form of decision-making criteria. In the following, the maintenance and repair approaches for each of the failure modes are ranked according to the required resources and the expected results from their implementation, using the fuzzy EDAS method. The proposed approach has been used for the set of compressors of Ilam Petrochemical Utility Unit. In this regard, firstly, the failure modes, which cause disruptions in the performance and, as a result, the compressors being taken out of service, have been examined, and among them, the consequences of five critical failure modes have been selected to being examined, based on the OREDA standard and the opinion of experts. The consequences of these failure modes on the compressor performance and finally their effects on the production process have been analyzed. Solutions have been proposed to deal with each of these failures and these solutions have been ranked.