Journal of Korean Society of Industrial and Systems Engineering (산업경영시스템학회지)

Society of Korea Industrial and System Engineering (한국산업경영시스템학회)
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Scheduling of a Casting Sequence Under Just-In-Time (JIT) Production

적시 생산 방식에서의 주조공정 스케줄링

  • Park, Yong-Kuk (School of Mechanical and Automotive Engineering, Catholic University of Daegu) ;
  • Yang, Jung-Min (Department of Electrical Engineering, Catholic University of Daegu)
  • 박용국 (대구가톨릭대학교 기계자동차공학부) ;
  • 양정민 (대구가톨릭대학교 전자공학과)
  • Published : 2009.09.30
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Abstract

In this article, scheduling of a casting sequence is studied in a casting foundry which must deliver products according to the Just-in-time(JIT) production policy of a customer. When a foundry manufactures a variety of casts with an identical alloy simultaneously, it frequently faces the task of production scheduling. An optimal casting schedule should be emphasized in order to maximize the production rate and raw material efficiency under the constraints of limited resources; melting furnaces and operation time for a casting machine. To solve this practical problem-fulfilling the objectives of casting the assigned mixed orders for the highest raw material efficiency in a way specified by the customer's JIT schedule, we implement simple integer programming. A simulation to solve a real production problem in a typical casting plant proves that the proposed method provides a feasible solution with a high accuracy for a complex, multi-variable and multi-constraint optimization problem. Employing this simple methodology, a casting foundry having an automated casting machine can produce a mixed order of casts with a maximum furnace utilization within the due date, and provide them according to their customer's JIT inventory policy.

Keywords

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