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Design of Experiment and Analysis Method for the Integrated Logistics System Using Orthogonal Array

직교배열을 이용한 통합물류시스템의 실험 설계 및 분석방법

  • Park, Youl-Kee (Department of Information Management Engineering, Korea University) ;
  • Um, In-Sup (Hanjin Logistics Institute) ;
  • Lee, Hong-Chul (Department of Information Management Engineering, Korea University)
  • 박율기 (고려대학교 정보경영공학전문대학원 정보경영공학과) ;
  • 엄인섭 (한진물류연구원) ;
  • 이홍철 (고려대학교 정보경영공학전문대학원 정보경영공학과)
  • Received : 2011.10.26
  • Accepted : 2011.12.13
  • Published : 2011.12.31

Abstract

This paper presents the simulation design and analysis of Integrated Logistics System(ILS) which is operated by using the AGV(Automated Guided Vehicle). To maximize the operation performances of ILS with AGV, many parameters should be considered such as the number, velocity, and dispatching rule of AGV, part types, scheduling, and buffer sizes. We established the design of experiment in a way of Orthogonal Array in order to consider (1)maximizing the throughput; (2)maximizing the vehicle utilization; (3)minimizing the congestion; and (4)maximizing the Automated Storage and Retrieval System(AS/RS) utilization among various critical factors. Furthermore, we performed the optimization by using the simulation-based analysis and Evolution Strategy(ES). As a result, Orthogonal Array which is conducted far fewer than ES significantly saved not only the time but the same outcome when compared after validation test on the result from the two methods. Therefore, this approach ensures the confidence and provides better process for quick analysis by specifying exact experiment outcome even though it provides small number of experiment.

이 논문은 Automated Guided Vehicle(AGV)를 이용하여 운영되는 통합물류시스템의 시뮬레이션 실험설계와 분석에 관한 방법을 제시한다. 물류창고의 AGVs(Automated Guided Vehicle system) 성능을 최대로 운영하기 위해선 많은 변수들이 고려되어져야 하는데 대표적 중요 요인에는 차량 대수, 속도, 운행규칙, 부품 타입, 스케줄링, 버퍼 사이즈 등이 있다. 우리는 이 논문에서 다양한 중요요인들 중 (1)처리량 최대화, (2)차량 이용률 최대화 (3)차량 혼잡 최소화, (4)Automated Storage and Retrieval System(ASRS) 이용률 최대화를 고려하기 위해 직교배열(Orthogonal Array)로 실험계획을 수립하였고 이를 이용한 시뮬레이션 기반 분석과 진화전략(Evolution Strategy : ES)를 이용한 최적화를 각각 수행했다. 그 결과 ES에 비해 직교배열이 실험 시간과 회수를 절약하였고 두 결과에 대한 유효성 검사 또한 큰 차이를 나타내지 않았다. 따라서 본 논문에서 제시한 방법을 이용한 분석 방법은 시간, 회수 그리고 실험의 정확성에 대한 분석의 효율성을 증대시킬 것으로 예상되며 통합 물류 시스템 이외의 시스템에도 적용이 가능 할 것으로 생각된다.

Keywords

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