A Fuzzy Logic-Based Modeling Method of Deciding Maintenance Policies

To make equipment maintenance policies more suitable to real operations,a fuzzy logic-based modeling method of deciding maintenance policies was proposed in this paper.Five maintenance policies which are built with downtime and breakdown frequency as decision criteria are discussed.To decide efficiently maintenance policies,the decision criteria are divided into low,medium,and high levels.On the basis of the levels,fuzzy sets and membership functions of the decision criteria are established with a fuzzy logic theory.A fuzzy logic algorithm of solving overall degree of satisfaction is presented to select the most efficient maintenance policy for equipment.Finally,the modeling method is tested.Experiment results show that the proposed method can solve efficiently problems of the traditional decision-making bias,and it is more valid and practical than the method of traditional decisionmaking grid (DMG).