Single- and multi-stage manufacturing systems under imperfect quality items with random defective rate, rework and scrap

Document Type : Article

Authors

1 Department of Industrial Engineering, Faculty of Engineering, University of Kashan, Kashan, Iran

2 Department of Industrial Engineering and Management, Shahrood University of Technology, Shahrood, Iran

3 Department of Industrial Engineering, Faculty of Engineering, University of Yazd, Yazd, Iran

Abstract

Abstract. The classical manufacturing systems assume that all of produced items are of perfect quality. They also does not consider rework process in manufacturing operations. Moreover, most of previous literature consider single stage production-inventory systems and do not consider multi stage options. However, in real world production-inventory systems, production of defective items is inevitable, and a fraction of produced items may be defective. In addition, to avoid extra costs and consider environmental issues, organizations tend to reworking activities. We propose single and multi stages production-inventory systems in manufacturing operations where the process is defective, rework is possible and a percent of items are scrapped. A main assumption, in current paper, is that the defective rate is assumed to be uncertain parameter. The grey systems theory, as a mathematical tool to address the uncertain information in real-world situations, is utilized to model the random defective rate via a grey nonlinear programming problem. The proposed issues are investigated via numerical examples to assess the impact of grey parameters on optimal solutions.

Keywords

References

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Scientia Iranica
Volume 30, Issue 6
Transactions on Industrial Engineering (E)
November and December 2023
Pages 2183-2202

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