关键词: 避险点, 生产与预防式维修模型, 威布尔分布, 易故障制造系统, 灵敏度分析

Abstract: Under the assumption that the machine breakdown ratio obeying to the Weibull distribution, a functional equation for production ratio with preventive maintenance ratio and inventory level was established. Based on this equation, with the decision objective of cost minimization in the manufacturing process, a hedging points based jointly Production and Preventive Maintenance(P&PM) policy model for manufacturing system of multi-machine was established. Through the numerical simulation, the optimal inventory level was calculated and preventive maintenance period was provided so as to optimize the performance of the manufacturing system. A sensitivity analysis illustrated that total cost of the system could be reduced by appropriate preventive maintenance which would decrease the maintenance probability.

Key words: hedging points, production and preventive maintenance model, Weibull distribution, failure-prone manufacturing system, sensityivity analysis