Design of a variable path tandem layout for automated guided vehicle systems : Wooyeon Yu, Pius J. Egbelu, v20, n5, 2001, pp305–319
- Publisher
- Society of Manufacturing Engineers
- Year
- 2002
- Tongue
- English
- Weight
- 307 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0278-6125
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✦ Synopsis
and keyword index ing rule selection, instead of generation of a full schedule. A typical simulation-based system is outlined and tested under various experimental conditions. Examined are the effects of stochastic events such as machine breakdowns and processing time variations on the system performance, and the effectiveness of the simulation-based approach from the control point of view is evaluated. Finally, different levels of two important factors are compared for the iterative approach (look-ahead window and scheduling period). Computational results show that, although simulation-based scheduling proves effective when these parameters are properly set, the overall performance diminishes due to the dynamic and stochastic nature of the system, which degrades the multipass improvement capability of the simulation runs. Experimental results also support the initial expectation in that frequent updates to the higherlevel schedule may not be necessary when these decisions are naturally "adaptive" to the unexpected system changes.