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Lookup NU author(s): John Dalton,
Emeritus Professor Pratyush Sen,
Dr Farhad Kenevissi
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In industry the scheduling of large made-to-order products, such as submarines or ships, is typically implemented using precise time intervals. As a result of this, schedules rarely if ever reflect reality, and this can make the task of managing large projects difficult and potentially costly. Not surprisingly, robustness is a desired property of a schedule, bringing with it a greater stability with less uncertainty. In addressing these problems, this paper first describes a practical jobshop model that is then extended to allow the inclusion of imprecise durations. By implementing this methodology on an industrial case study, a submarine pressure hull, a means of gauging and providing greater robustness of scheduling is determined. This investigation into robustness also shows that improvements can be made by optimizing pessimistic duration times in contrast to the common practice of using optimistic times.
Author(s): Dalton JA, McGregor JI, Sen P, Kenevissi F
Publication type: Article
Publication status: Published
Journal: Journal of Ship Production
Print publication date: 01/08/2005
ISSN (print): 8756-1417
ISSN (electronic): 1542-0469
Publisher: Society of Naval Architects and Marine Engineers