• Journal of Korean Society of Industrial and Systems Engineering
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• v.28 no.1
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• pp.64-71
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• 2005

The purpose of this study is to propose guidelines for introducing the Just-In-Time (JIT) production system to enhance the competitiveness of Korean manufacturing companies. This study employed an extensive survey on the use of the JIT production systems among different korean manufacturing companies to understand the current status of the JIT production system in use and to identify the benefits from implementing JIT production system. The survey has covered 170 manufacturing companies of different sizes from various sectors of Korean industries including electronics, automobiles, machineries, and textiles. In conclusion, our research results support that the JIT production system would contribute to increase the manufacturing performances of Korean manufacturing companies through lower inventory level and increased quality level.

• IE interfaces
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• v.9 no.2
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• pp.95-104
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• 1996

본 논문에서, 우리는 일본제조 시스템의 대표격인 도요타 시스템을 소개하려고 한다. 도요타 시스템은 일본식 생산관리라고 하는 즉시시스템(JIT)과 전사적 품질관리(TQC)로 세계 최고의 생산성과 품질을 이룩했다. 도요타에서 JIT시스템을 성공시키기 위한 여섯 가지 기본 사항을 살펴보았다. 또한 JIT 시스템의 운영도구인 간판 시스템을 자세히 살펴봤다. 결론에선 우리나라 생산 시스템에 도요타 생산시스템이 도움이 되며, 우리나라와 일본을 비교하여, 우리도 일본 생산 시스템을 앞설 수 있음을 제시했다.

• Proceedings of the Korea Society for Simulation Conference
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• 1992.10a
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• pp.14-14
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• 1992

대 Lot 생산 계획은 기종변경 시간을 최소화함으로써 생산성을 높여 원가를 절감할 수 있으나 수요의 변화에 능동적으로 대처할 수 없으며 잦은 생산 Schedule 변동에 의하여 재 품절이 발생하여 Main Line이 정지되고 재공품 재고의 과다 발생으로 Lead Time이 길어지고 완제품 재고가 증가하는 등의 문제점을 내포하고 있다. JIT 시스템은 필요한 때에 물건을 필요한 양 만큼 생산제조 한다는 이상적인 생산 개념을 실현하기 위하여 평준화 생산 시스템, KANBAN시스템, 소 Lot 생산시스템 등의 하위 시스템으로 구성된 생산시스템이다. JIT 시스템은 Pull Type 시스템으로 생산의 흐름을 원활히 하고 공정을 개선하여 재공품 재고, 납기 및 생산준비 시간의 단축을 도모하여 Lot의 크기는 되도록 작게하는 소 Lot 평준화 생산 방식을 추구하기 때문에 수요의 변화에 능동적으로 대처할 수 있으며 자재 납품 업체의 부하를 평준화하여 자재 품절을 방지함으로써 생산 효율을 높일 수 있다. JIT 시스템의 이러한 효과를 계량화하여 가시적으로 보여주기 위하여 Computer simulation 기법을 도입하였다. 이 기법은 생산 Line에 물리적 변화를 가하지 않고 Model 사용자들이‘What if’라는 Scenario를 작성하여 제안된 시스템에 대한 결론을 추론하는 것이 가능하기 때문에 문제 해결에 효율적인 Tool이라 할 수 있다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.23 no.58
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• pp.89-100
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• 2000

There use many production management systems for increasing productivity, minimizing inventory, keeping due dates and maximizing use of resources. MRP, GT and JIT are popular among these systems. There use many production management systems for increasing productivity, minimizing inventory, keeping due dates and maximizing use of resources. MRP, GT and JIT are popular among these systems. In this study, we had designed mixed production system which integrated searching and grouping function of GT, purchasing function of JIT and based on MRP and developed related algorithms and applied systems. The developed system was based on appling renewed algorithms for existing MRP system. To test efficiency operated real-data but we have tested renewed algorithms using sample-data because of massive real-data.

• Journal of the Korea Safety Management & Science
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• v.3 no.3
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• pp.87-95
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• 2001

In Production system, there are two ; One is the JIT system, which was developed by the Toyota corporation : the other is the MRP system, which was developed in the United States. The JIT system has been proved its effectiveness for production management system by many industries, however the effectiveness of its application in non-repetitive productions is yet uncertain unlike the MRP system. There has been many efforts in comparing and analyzing the usefulness and the limitation of those production systems. Accordingly, this study has focused its simulation model using MRP and JIT.

• Korean Management Science Review
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• v.13 no.2
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• pp.13-24
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• 1996

CIM and JIT have been known as a suitable production system under various product with small quantity production environment which demands short delivery, high quality, and flexibility. CIM is the integrated system for both automated facilities and computer information processing technology and JIT is the system for an exhaustive waste elimination. This paper proposes the JIT-CIM system which combines the concepts and characteristics of JIT and CIM. The JIT-CIM system has been implemented under the strategy of management such as market-in, integration, recycling and resonable profit and which integrates the automation facilities and information processing technology on the basis of waste elimination concept and small lot pronciple of JIT.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.17 no.31
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• pp.43-48
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• 1994

In an effort to become more competitive and cost efficient many companies have shifted from traditional job-shop production to production using group technology (GT) and cell manufacturing (CM). Cellular manufacturing is critical to implementing Just-in-Time (JIT) production which pointed out in the previous articles. and adopt the U-shaped cell which allows for entry at one end of the U and exist at the other. This paper looks at the availability of cellular manufacturing, by applying those concepts to the small and medium sized industry.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.21 no.46
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• pp.1-18
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• 1998

The purpose of this study is to identify critical factors facilitating JIT innovation process for Korean component manufacturers. In order to find the answers to this issue, this study has empirically studied the corelations among JIT innovation culture, competitiveness, and incentive factors. Cluster, ANOVA, and regression analyses were performed from 92 collected survey data. It has found that Korean component manufacturers strongly rely on their inner JIT innovation culture to improve competitiveness. It has also found that the organizational resource and managerial priority should be focused on establishing clear goals and objectives for improvement, and creating open atmosphere with respect to operational process.

• Journal of the Korea Safety Management & Science
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• v.2 no.2
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• pp.29-40
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• 2000

In this paper, under JIT kanban system designed by Moeeni, each performance measures (service level, inventory level) identify the robust optimal level at a uncertain environment, and when there are multiple performance characteristics, it propose the optimal design-method and the optimal level decision-method, which consider multiple performance characteristics.

• Proceedings of the Safety Management and Science Conference
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• 2001.05a
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• pp.185-188
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• 2001

Many production management systems for increasing productivity, minimizing inventory, keeping due dates and maximizing use of resources have been proposed, and GT, MRP and JIT are frequently used among these systems. The three systems have merits and demerits through comparing with each other. Because each system has mutual dependence, a hybrid production system is necessary for using their merits maximally. In this study, a hybrid production system is designed by combining GT, MRP and JIT, which is suitable in the domestic production system.