• Journal of the Korea Society for Simulation
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• v.22 no.2
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• pp.93-100
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• 2013

Mixed model production system means that various products are manufactured alternately in a line, and it has become a popular system in the era of multi-product small-quantity production. However, in the mixed model production system using flow line, the unbalance among stations is not inevitable because the workloads of stations cannot be the same. Thus, flow line system has been replaced to cellular manufacturing system for reducing the loss of waiting due to the unbalance of stations. In this paper, we introduce the simulation case study of an automated welding line which produces the parts of excavator. The factory has considered replacing the mixed model flow line to the cellular manufacturing system based on FMC concept. The increase of production quantity is estimated about 26.7%, and the lead time is reduced more than 55%. Furthermore sensitivity analyses are conducted considering the changes of product-mix.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1998.10a
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• pp.741-756
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• 1998

최근 국내의 기업들은 IMF라는 상황하에 상당히 어려운 실정에 처해 있다. 하지만 국내의 대부분의 기업들은 어려운 상황을 헤쳐나가기 위해 안간힘을 쓰고 있고, 또 헤쳐나갈 수 있을 것이다. 본 연구는 국내 제조업체의 대부분을 차지하고있는 중소제조업체들에게 최적설비배치를 위한 GT셀형성에서부터, 최적기계배치, 공정거리 계산의 모든 단계를 검증하고 셀생산방식의 도입의 타당성을 확인해볼 수 있는 알고리즘 및 프로그램을 개발하는데 그 목적이 있다.

• Journal of the Korea Society for Simulation
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• v.20 no.3
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• pp.119-127
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• 2011

Overhaul and repair service means the sequential processes of disassembly, repair and reassembly for a product which has been used for a long time. Overhaul is required for the companies producing airplanes, ships, trains, military weapons and heavy industrial equipments which are very expensive and have a long life cycle. The most important performance measure of the overhaul repair shop is usually the lead time. Thus, how to design the manufacturing system to meet the delivery date is a major concern in overhaul repair shop. This paper introduces the case study of an overhaul repair shop producing military weapon systems with the 3D simulation tool, $QUEST^{TM}$. At first, the characteristics of overhaul shop and what should be considered for simulation modeling are explained. Then, various simulation scenarios including two types of disassembly systems, one is flow line system and the other is cell system, are discussed with the results of simulation experiments.