关键词: 小批量生产过程, 串联可修系统, 统计过程控制, EWMAtX-te联合控制图, 预防性维修策略

Abstract: Owing to the limited time horizon and finite population items of short-run production process,there were not enough samples data to build the control chart in Statistical Process Control (SPC) process.Aiming at the two-stage series repairable system,the integration problem of maintenance strategy and SPC process oriented to short-run production was proposed.According to the feature of t statistic,EWMAtX-te joint control chart was built,and the statistical properties of joint control chart was analyzed.The quality state of system was monitored by joint control chart monitors,and the corresponding maintenance strategy was adopted according to the quality state.The integrated mathematical model of SPC and Condition Based Maintenance (CBM) was constructed by using Markov-chain.A numerical example was given to illustrate the application of the proposed integrated model,and the results showed that the proposed model had advantage on cost saving by comparing with the different situations.A sensitivity analysis for process parameter,time parameters and cost parameters was conducted by using fractional factorial design,and the effectiveness of proposed method was proved.

Key words: short-run production, series repairable systems, statistical process control, EWMAtX-te joint control chart, preventive maintenance