Industrial Engineering Journal ›› 2012, Vol. 15 ›› Issue (4): 21-27.

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Performance Evaluation for a Multi-Shuttle Automated Storage and Retrieval System

  

  1. (Research Center for Modern Logistics, Graduate School at Shenzhen, Tsinghua University,Shenzhen 518055, China)
  • Online:2012-08-31 Published:2012-09-19

Abstract: The automated storage and retrieval system (AS/RS) with multiple shuttles are addressed in this paper. It is assumed that the system operates under the first-come-first-served and nearest neighbor scheduling rules. According to the operational characteristics of the system, analytical models for expected travel time estimation are derived. These models are applicable for evaluating throughput of multi-shuttle AS/RS for circumstance with different number of shuttles and different types of shelves. The proposed method is validated by the Monte Carlo simulation. Results show that the proposed models are effective and accurate for evaluating the throughput of multi-shuttle AS/RS.

Key words: performance evaluation, automated storage and retrieval system (AS/RS), Monte Carlo simulation