Research On Preventive Opportunistic Maintenance Policies In Finite Time Horizon For Production Systems

Production systems maintenance work have very important impact onthe economic efficiency and the market competitiveness of the enterprisesand which are the important decisive factors of the manufacturing costs andoperating costs. Maintenance policy is used to analyze the maintenance jobsof equipment and production systems through the quantitative descriptionand to optimize the maintenance plans by the mathematical models and othertools and to improve the performance of maintenance work and theequipments security.The decision of maintenance plans of the production systems areassociated with the production systems structure especially in the multipleequipments systems. And the production plan will make the relationship tochange in different of the equipments. The opportunistic maintenance policyis a very effective means to decrease the maintenance cost of multipleequipments production system which can sufficiently utilize the relativityof equipments in production system. In this paper the production systemspreventive opportunistic maintenance policies are be proposed to avoidinsufficient maintenance or excess maintenance by selecting the suitableopportunistic thresholds and the values.In this paper, an reliability-basedsingle equipment opportunistic maintenance in finite time horizon policy is proposed which consider the maintenance cost and the equipmentsreliability, and use effective-cost ratio to determine maintenance job typesand the evolutionary processes of equipment reliability are deduced.The multiple unit equipment preventive opportunistic maintenancepolicy model is constructed consider with the system risk level. The risklevels of the equipments are used to be the opportunistic thresholds in thismodel. the minimized maintenance cost is optimized by choosing the moreeconomical efficiency maintenance method type. and the risk evolutionaryprocesses of are deduced the relative inferiority degree concept is combinedwith system risk model to construct the equipment preventive opportunisticmaintenance policy model.The multiple equipment production system preventive opportunisticmaintenance policy model is constructed by the basis of analyzing theformation mechanism rules of the maintenance opportunities in this modelthe production system is the research objective and the minimization ofmaintenance cost is the optimization objective.The production system preventive maintenance information system isdesigned and developed and it is applied in the motor vehicle partsmanufacturing enterprise which is designed on the basis of the productionsystem preventive opportunistic maintenance policy models which isproposed in this paper.