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Compar ison of Dynamic Production Controllers in a Testing and Rework Cell
곽춘종 ( Choon Jong Kwak ) 한국경영공학회 2013 한국경영공학회지 Vol.18 No.1
How to control materials is determined by production control such as dispatching rules, preemption, and dispatching within preemption. Many dynamic production controllers have been developed over the decades. Among them, this paper introduces three dynamic production controllers specifically for the testing and rework cell in a dynamic, stochastic computer integrated manufacturing (CIM) system. They have individually showed good performance by comparing each of them with its counterpart static control approaches. In this paper, their design and operational features are delineated and their performance is compared under the same and fair conditions. This research provides insights into the design and operation of dynamic production controllers for the testing and rework cells of dynamic and stochastic CIM systems.
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시뮬레이션을 이용한 자동차 부품 공급 시스템 도입 방안 분석: R자동차 사례
강명훈(Kang, Myung Hoon),곽춘종(Kwak, Choon Jong) 전북대학교 산업경제연구소 2014 아태경상저널 Vol.6 No.1
본 논문은 R자동차 공장 사례를 통해 공장 내 물류 개선 방안을 연구하고자 한다. 즉, 유인 견인차로 공급되던 도어 조립체, 후드 조립체, 트렁크 조립체를 AGV를 이용하여 공급하기 위해 무인공급시스템으로의 전환 타당성을 검토한다. 검토 수단으로는 Witness 컴퓨터 시뮬레이션 기법을 적용한다. 본 실험에서는 우선 AGV의 적정 필요 대수를 산출한다. 또한 AGV 전용 도로를 왕복 1차선으로 적용하는 가능성을 확인한다. 마지막으로 무인공급시스템의 투자타당성 분석을 통해 무인공급시스템으로의 전환이 타당함을 보인다. This research studies an alternative plan to improve the material flow between two production lines through a case of R motors. That is, this paper investigates the effectiveness of changing manned tow trucks into an unmanned logistics system based on AGVs (Automated Guided Vehicles) to move door, hood, and trunk assemblies. Witness is adopted for this simulation study. The experiment first determines the optimal number of AGVs. In addition, the use of a single line is tested for AGVs. Finally, this research shows that the investment on the unmanned logistics system is effective.
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장요한 ( John Jang ),곽춘종 ( Choon Jong Kwak ) 한국생산성학회 2014 生産性論集 Vol.28 No.2
This paper provides specific implementation solutions for quality improvement in products and services of coffee shops through a case study. SERVQUAL is adopted and modified for this study to identify customer requirements for services of coffee shops. Quality Function Deployment (QFD) is introduced with a house of quality approach to reflect customer requirements in products and services. The house of quality approach involves a pair of houses of quality in this paper, beginning with engineering characteristics for product and services. This study finally draws specific implementation solutions based on the engineering characteristics by using a pair of houses of quality.
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신제품 설계 및 품질 개선 측면에서 본 무상보증기간 중 항만시설장비 고장 분석
안성관(Sung kwan An),곽춘종(Choon jong Kwak) 한국생산관리학회 2018 한국생산관리학회지 Vol.29 No.2
우리나라에서 항만은 수출입 화물의 99.7% 이상을 처리하는 국가 핵심 물류거점이다. 특히 항만시설장비는 컨테이너터미널의 운영에 필수적인 요소이다. 본 연구는 고장 전파에 의한 고장이 상대적으로 적은 장비 운용 초기인 무상 보증기간동안 항만시설장비에서 발생한 실제 고장 데이터를 최초로 분석하였다. 또한, 항만시설장비 중 트랜스퍼크레인이나 컨테이너크레인이 아닌 스프린터캐리어의 고장 데이터를 국내에서 처음으로 다루었다. 본 논문에서는 장비 고장 실제 데이터를 통계적으로 분석하여 그 결과를 정비 업무 경력자들의 기존 인식뿐 아니라 선행 연구 결과와 비교하고 그 차이의 원인을 설명하였다. 본 연구는 무상보증기간에 순수하게 장비 자체의 이유로 발생한 고장만을 분석함으로써, 그 결과를 장비 품질개선과 신제품 설계에 활용할 수 있으며, 컨테이너터미널의 운영에 적용하여 생산성과 효율성을 높이는데 기여할 수 있다. Ports are national key logistics bases that process more than 99.7% of import and export freights in South Korea. Port facility equipment is particularly an essential element for operating container terminals. This research newly analyzes the actual failure data collected from port facility equipment during the warranty period, an initial operating period with relatively few failures due to failure propagation, In addition, this study deals with the failure data of sprinter carrier, rather than transfer crane or container crane, for the first time in South Korea. This research statistically analyzes actual failure data, compares its results with those of a literature survey and a preliminary interview with experienced mechanics, and explains the reasons for their differences. By analyzing only the failures caused by the equipment itself during the warranty period, this paper provides useful results that can be used for quality improvements and new product design and applied to operations of container terminals to improve their productivity and efficiency.
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김혜림 ( Hye Lim Kim ),최영진 ( Young Jin Choi ),곽춘종 ( Choon Jong Kwak ),김기석 ( Ki Seog Kim ) 한국경영공학회 2014 한국경영공학회지 Vol.19 No.4
This paper aims at improvement in core competencies of food service providers by using Quality Function Deployment and Fuzzy Set Theory. This research identified customer requirements through customer surveys and monitoring customer feedback and determined service characteristics by expert interviews for the quality function deployment. In addition, the fuzzy set theory was applied to transforming vague and subjective customer requirements into clear and objective numerical values. The top management and managers of food service providers can identify the priorities for improvement in service characteristics, on which they can focus.
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