물류센터 일괄상하역체계 개선을 위한 설계지원 시뮬레이터 (Design Support Simulator for the Improvement of Cargo Batch Loading and Unloading Systems in a Warehouse)

서지정보

· 발행기관 : 한국해운물류학회
· 수록지 정보 : 해운물류연구 / 32권 / 3호 / 497 ~ 519페이지
· 저자명 : 이언경, 최용석, 김선구

초록

물류센터의 상하역작업은 출하 대기장소에 있는 파렛트 화물을 상하차하는 작업이다. 제한된 공간에서 반복적인 상하역작업이 원활하게 수행되기 위해 일괄상하역 방식을 지원하는 3가지 시스템 대안을 제시하였다. 본 연구에서 제안된 일괄상하역 시스템의 생산성 향상 정도를 파악하기 위해 다양한 대안 생성이 가능하도록 객체지향 시뮬레이션 방법론을 사용하여 재사용 및 확장이 용이하도록 하였다. 시뮬레이션 분석 결과 트럭 서비스 평가지표인 트럭 서비스시간이 감소하고, 지게차의 가동률은 현재보다 대기시간이 절반 정도 감소되는 것으로 나타났다. 개발된 시뮬레이션 모델은 향후 물류센터 분석 및 설계에 효과적으로 활용될 것으로 기대된다.

영어초록

Warehousing operations include palletizing operations that consist of container handling with forklift dock, and container shifting between rack areas and docking area using forklists. However, the loading and unloading operations are subject to the waiting time needed to perform lifting operations by the forklift. To solve this problem of increased waiting time, the loading and unloading system can perform the operation by batched pallet with its own power. Recently, a design that uses a simulation method was proposed to minimize the error in the new system in warehouses and utilize multiple simulation techniques to reduce design time. Previous studies reviewed the simulation model to check specific changes in the performance of the new system when it was introduced in a warehouse. This study dose a comparative analysis of the performance of the proposed alternative and the current designs. In order to efficiently perform repeated work in a limited space, we provide three alternatives to support the batch loading and unloading operation. They are the general-purpose system, dedicated system, and system for a wing-body truck. The simulation model has been developed to compare the productivity of the proposed system to that of the current system. The alternatives proposed to improve the performance of forklift system for use in current warehouse operations of loading and unloading improves each palletizing operation by simultaneously reversing the batch up and down the upper and lower stations as opposed to the batch lifting method for individual tasks, thereby, decreasing the waiting time of the forklift. The cargo loading and unloading system that uses the specification designed to target a prototype testing phase, with the input data as presented in this study, does not reflect the operating conditions of a complete warehouse. As a result, it means that if the truck service is improved and the waiting time of the forklift is greatly reduced, then the number of forklifts required to handle external trucks can be reduced sufficiently. However, the introduction of the new system requires the generation of a large initial investment, which also depends on the application of warehouse specific size and volume needed to perform a productivity level analysis using quantitative economics. The design support simulator plays a role in periodically simulating and calculating the actual forklift’s movement, according to the operational rules, and the transfers of cargos by stacking rules. By using statistics measures, we can design its physical layout. This study aim to provide feasible alternatives for batch loading and unloading systems used in warehouses. The result of this study should take into consideration the design of warehouses as well.

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