ELECTRE III Based on Ranking Fuzzy Numbers for Deterministic and Fuzzy Maintenance Strategy Decision Problems

A few literatures on the maintenance strategy (MS) decision making have been found. Moreover, they never deal with the case that the most appropriate MS is selected for a machine when two kinds of evaluations of each MS are considered: deterministic or fuzzy in relation to each evaluation criterion (EC). In order to resolve the problem, ELECTRE III based on ranking fuzzy numbers is proposed in this paper. The distance index between the centroid point of a fuzzy number and original point is employed to deal with the fuzzy evaluations. Then, they are treated like deterministic evaluations while ELECTRE III is used. The result of case analysis shows that the proposed method can select the most appropriate MS for a machine when fuzzy or deterministic evaluation in relation to each evaluation criterion is considered.