Optimal Production and Inspection Strategy of Imperfect Rework, Inspection Time and Maintenance Error

• Main Authors: Yao,TsungTing, 姚宗廷
• Other Authors: Chen,YanChun
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/64952615804884204201

碩士 === 東南科技大學 === 工業管理研究所 === 99 === This paper proposes an optimal policy which integrates production, inspection, maintenance, inspection time and inventory problem to consider imperfect rework and maintenance error are allowed for an imperfect production process. We find the optimal inspection interval, the expected number of inspection and economic production quantity of the maximum expected profit per unit. The production process may turn into “out-of-control” state from “in-control” state because of the human behavior or the machines. If the production process is “in-control” state, we execute preventive maintenance, system age is related to the level of preventive maintenance. When the production process is “out-of-control” state, some defective items are produced. Assuming some of the defective items can be reworked and turn to well item, others can not be reworked and turn to waste item. In conclusion, we investigate the benefit of the preventive maintenance in the deteriorated system of the production process. Numerical examples illustrate the effect of preventive maintenance level, imperfect rework, inspection time and maintenance error on the expected profit per unit.