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An Empiricallybased Simulation Study of Functional versus Cellular Layouts with Operations Overlapping

An Empiricallybased Simulation Study of Functional versus Cellular Layouts with Operations... Cellular and functional layouts were investigated under a varietyof realworld conditions via a twostage computer simulation study. Inthe first stage, simulation models were developed for three actualcompanies. Six different cell formation procedures were used to developthe cellular layouts and CRAFT was used to develop the functionallayout. The following six variables were used to measure shopperformance average flow time, maximum flow time, average distancetravelled by a batch, average workinprocess level, the maximum levelof workinprocess, and the longest average queue. Factors observed inthe first stage of the study that appear to make cellular manufacturingless beneficial than might otherwise be expected were found to be smallbatch sizes, a small number of different machines the parts require intheir processing, short processing times per part, the existence ofbottleneck machines i.e. machines with insufficient capacity, and theabsence of natural part families i.e. sets of parts with similarprocessing requirements. In the second stage of this study, earlierassumptions associated with sequencedependent setup times and move timedelays were relaxed. These two parameters were identified as importantfactors as well. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Operations & Production Management Emerald Publishing

An Empiricallybased Simulation Study of Functional versus Cellular Layouts with Operations Overlapping

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References (21)

Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0144-3577
DOI
10.1108/01443579310025303
Publisher site
See Article on Publisher Site

Abstract

Cellular and functional layouts were investigated under a varietyof realworld conditions via a twostage computer simulation study. Inthe first stage, simulation models were developed for three actualcompanies. Six different cell formation procedures were used to developthe cellular layouts and CRAFT was used to develop the functionallayout. The following six variables were used to measure shopperformance average flow time, maximum flow time, average distancetravelled by a batch, average workinprocess level, the maximum levelof workinprocess, and the longest average queue. Factors observed inthe first stage of the study that appear to make cellular manufacturingless beneficial than might otherwise be expected were found to be smallbatch sizes, a small number of different machines the parts require intheir processing, short processing times per part, the existence ofbottleneck machines i.e. machines with insufficient capacity, and theabsence of natural part families i.e. sets of parts with similarprocessing requirements. In the second stage of this study, earlierassumptions associated with sequencedependent setup times and move timedelays were relaxed. These two parameters were identified as importantfactors as well.

Journal

International Journal of Operations & Production ManagementEmerald Publishing

Published: Feb 1, 1993

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