An AS/RS is being designed; randomized storage is to be used. One alternative being considered is to

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An AS/RS is being designed; randomized storage is to be used. One alternative being considered is to have each aisle be 70 tall and 310 long. The S/R has a horizontal speed of 425 fpm and a vertical speed of 80 fpm. It requires 0.40 minute to pick up or deposit a load. The activity level for the system varies during each shift. The heaviest operating period is a time during which a large number of retrievals must be performed.

During peak activity, each S/R must be capable of performing 30 retrievals per hour and 10 storages per hour. It is expected that 100% of the storages will be performed with dual-command cycles.

a. Can the system handle the required workload? Why or why not?

b. If, during the peak period, the number of retrievals is 28 per hour and the number of storages is six per hour, what will be the utilization for each S/R?

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Facilities Planning

ISBN: 9780470444047

4th Edition

Authors: James A. Tompkins, John A. White, Yavuz A. Bozer, J. M. A. Tanchoco

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