Failure Mode and Effect Analysis Method Based on a Distance Interval Number Operator

Abstract:

When the attribute value of the existing failure mode and effect analysis （FMEA） method is the intuitionistic fuzzy number and the risk degree is measured by deterministic distance operator， it is difficult for evaluation experts to accurately describe the related uncertainty problems. Therefore， first an intuitionistic fuzzy hybrid Euclidean distance interval number （IFHEDIN） operator and its excellent properties are proposed based on the study of the ordered weighted distance operator， the theory of interval number and the sorting method of interval number. Then， the uncertain IFHEDIN operator is constructed to improve the FMEA method so as to analyze the reliability of failure modes of products or systems， and to calculate and rank the risk levels at the same time. Finally， the effectiveness， the reliability and accuracy of the proposed approach are verified by the risk analysis and evaluation of failure mode in the actual hospital radiation tumor treatment process， which provides decision-making support for relevant medical diagnosis managers to deal with and control risks.