A carousal storage system is designed to serve a mechanical assembly plant. The specifications on the system are that it must have a total of 400 storage bins and a throughput of at least 125 storage and retrieval transactions/hr. Two alternatives configuration are being considered. (1) a one-carousal system and (2) a two carousal system. In either case, the width of the carousel is to be 4.0ft and the spacing between carriers = 2.5ft. One picker-operator will be required for the one-carousal system and two-picker operator will be required for the two carousal system. In either system, Vc = 75ft/min. For the convenience of the picker operator, the height of the carousel will be limited to five bins. The standard time for a pick and deposit operation at the load/unload station = 0.4min if one part is picked or stored per bin and 0.6min if more than one part is picked or stored. Assume that 50% of the transaction will involve more than one part. Determine (a) the required length of the one-carousel system and (b) the corresponding throughput rate. (c) the required length of the two-carousel system and (d) the corresponding throughput rate (e) which system better satisfies the design specification ?
A carousal storage system is designed to serve a
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