Decision Optimization of Urban Rail Transit Equipment Maintenance Mode Based on Reliability

The paper proposes an urban rail transit equipment maintenance mode decision method (EMMDM). The framework takes the reliability-centered maintenance (RCM) into consideration to make up for the problem that over-maintenance and under-maintenance of urban rail transit equipment for the decision-making model. To improve the application process of the RCM, the analysis of the composition and critical equipment of urban rail transit equipment is of vital importance. Failure rate, failure detectability, and failure consequence are selected as the equipment risk evaluation indexes. The cycle of optimal maintenance mode is given by the maintenance mode choice model based on the failure risk. Taking automatic ticket gate machine (AGM) and environmental monitoring equipment as examples, the results show cost savings of 8% and 2%, respectively, supporting the optimization of maintenance mode decision.