A multi-objective approach to simultaneous determination of spare part numbers and preventive replacement times

摘要

Different models have been proposed in the field of preventive maintenance planning fo finding optimal age replacement policies. While previous studies have focused mainly 01 classical cost objectives, this paper presents a novel multi-objective model for preventivi replacement of a part over a planning horizon. The proposed model considers differen objectives and practical issues, such as corrective replacement and its consequences, resid ual lifetime objective, and kind of productivity index. Also, the model determines numbe of spare parts, required for replacement with the defected part, to be provided at the begin ning of the planning horizon. The multi-objective model is applicable for machines o equipments which are repaired through replacing their defected part with new spare part For solving the multi-objective model, regarding to ability of ^-constraint method to gen erate different pareto-optimal solutions, a procedure is developed based on this method The procedure shows how the f:-constraint method can be used for finding preferred solu tion in situations where there is no access to decision maker. The model and solution pro cedure are illustrated by a numerical example.