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標題: Design and storage cycle time analysis for the automated storage system with a conveyor and a rotary rack
作者: Hsieh, Y.J.
Chang, S.E.
Chang, S.C.
關鍵字: conveyor systems;rotary racks;storage systems;queuing;closed-loop conveyors;carousel system;performance;models
Project: International Journal of Production Research
期刊/報告no:: International Journal of Production Research, Volume 45, Issue 22, Page(s) 5383-5395.
In this paper, we analyse the performance of an automated Work-In-Process (WIP) storage system consisting of a conveyor and a rotary rack. The stability condition and the expected storage cycle time are derived to analyse the performance of the WIP storage system. As part of the storage cycle time analysis, the derived expected waiting times at the conveyor and the rotary rack are important performance measures that can be used for buffer-sizing purpose in such systems. Given the fixed storage space of the rotary rack, we also develop a heuristic approach to determine the near optimum 'shape' of the rotary rack so that the expected storage cycle time is minimized. Numerical results are presented to examine the storage cycle time model and the proposed shape design. The analytical model introduces a simple approach over simulation with acceptable accuracy; it is useful when designing such WIP storage systems. Moreover, it can be expanded to model more complex systems. The derived model also provides insightful information on the design parameters that a typical simulation tool can hardly provide.
ISSN: 0020-7543
DOI: 10.1080/00207540600891390
Appears in Collections:科技管理研究所

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