Industrial Engineering Journal ›› 2020, Vol. 23 ›› Issue (3): 59-64,74.doi: 10.3969/j.issn.1007-7375.2020.03.008

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A Study of the Quality Batch Model Considering Equipment Degradation and Rework

FANG Yexiang, WANG Hongdong, QIAN Qing, FAN Shuhai   

  1. School of Economics and Management, Nanjing Tech University, Nanjing 211816, China
  • Received:2019-05-23 Published:2020-07-04

Abstract: In order to get the maximum quality batch, the calculation method of expected profit value is studied under the marginal effect of rework cost. The production process is divided into two stages in which one is continuous processing without rework and the other is continuous processing requiring rework. The batch calculation formula under the quality control strategy and the quality batch corresponding to the maximum profit under the marginal cost are given. Monte Carlo simulation and Design Expert 8.0.6 software are used to work out the result. The expected profit value of rework cost is compared with that of no rework cost. Through the digital experiment, the research shows that the quality lot size considering the marginal effect of rework cost is larger than the general economic lot size, and the expected profit at maturity is also the largest.

Key words: production batch, rework, response surface method, expected profit

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