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A study on the Waiting Line in the Automated Storage/Retrieval System with Dual Command Policy  

Chang, Jin-Ick (Dept. of Quality Management, Chung Cheong University)
Kim, Won-Joong (Dept. of Industrial Information & System Engineering, Ajou University)
Publication Information
Journal of Korean Society of Industrial and Systems Engineering / v.28, no.4, 2005 , pp. 134-141 More about this Journal
Abstract
Due to the complexity and stochastic nature of automated warehousing system, items are usually queued up at I/O point. We introduce a storage/retrieval policy : dual-command. We present quick approximations to queueing phenomena under these policies. It is assumed that the storage and retrieval arrival pattern follow the same poisson process. We also assumed that storage queue and retrieval queue being operated separately. The approximation attempts are performed under the proposed storage/retrieval policies after we derive S/R machine travel time distributions.
Keywords
Automated Warehousing System; Dual Command; Queueing System;
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