Effectiveness of vehicle reassignment in a large-scale overhead hoist transport system
SCIE
SCOPUS
- Title
- Effectiveness of vehicle reassignment in a large-scale overhead hoist transport system
- Authors
- Kim, BI; Oh, S; Shin, J; Jung, MY; Chae, J; Lee, S
- Date Issued
- 2007-02-15
- Publisher
- TAYLOR & FRANCIS LTD
- Abstract
- This paper proposes an efficient vehicle reassignment dispatching rule and demonstrates the effectiveness of the rule using an overhead hoist transport (OHT) system for a semiconductor fabrication line. The OHT system has more than 150 OHT vehicles and its target vehicle utilization level is 70%. It allows direct delivery such that an inter-bay wafer movement can be accomplished by a single vehicle. Simulation analysis is used to compare the proposed rule with the shortest travel distance first (STDF) rule and existing reassignment-based rules. While STDF rule requires 170 vehicles for the target utilization level, the proposed vehicle reassignment rule requires only 161 vehicles. At the same time, the lead time and the variance of the lead time have been significantly reduced. The proposed rule also improves system performance compared to existing reassignment-based rules.
- Keywords
- reassignment; dispatching rule; overhead hoist transport; automated guided vehicle; DISPATCHING RULES; DESIGN
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23570
- DOI
- 10.1080/00207540600675819
- ISSN
- 0020-7543
- Article Type
- Article
- Citation
- INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH, vol. 45, no. 4, page. 789 - 802, 2007-02-15
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.