Performance analysis of miniload systems

Authors:
D. J. Medeiros;E. Emory Enscore, Jr.;Alan Smith
Affiliations:
Department of Industrial and Management Systems Engineering, Pennsylvania State Univsrsity, University Park, PA;Department of Industrial and Management Systems Engineering, Pennsylvania State Univsrsity, University Park, PA;Department of Industrial and Management Systems Engineering, Pennsylvania State Univsrsity, University Park, PA
Venue:
WSC '86 Proceedings of the 18th conference on Winter simulation
Year:
1986

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Abstract

A miniload is an automated storage and retrieval system which stores small parts in bins or totes. The system consists of racks with a central aisle along which a computer controlled stacker crane travels to store and retrieve the bins. These systems are typically used in order picking applications, or in manufacturing support for the storage of tools and small parts.This paper describes a simulation model of a single aisle, single pickup and delivery location miniload system. The model can be used to predict system parameters such as dual cycles per hour, crane and operator utilization and distance traveled by the crane. One can use the model to help design a miniload system that is capable of meeting or exceeding a given number of dual cycles per hour. This can be done by varying the height and length of the aisle, crane speeds, and/or storage policies. Examples will be used to demonstrate this design capability.The simulation model is written in SIMAN (Pegden, 1985) and the data support programs in FORTRAN. All elements of the model run on an IBM PC.