Job sequencing with uncertain and controllable processing times

Job sequencing with uncertain and controllable processing times

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Article ID: iaor20012326
Country: United Kingdom
Volume: 6
Issue: 5
Start Page Number: 483
End Page Number: 493
Publication Date: Sep 1999
Journal: International Transactions in Operational Research
Authors: , ,
Keywords: production, fuzzy sets
Abstract:

In this paper, a single machine scheduling problem is considered. The jobs' processing times are controllable (i.e., they may take any value within a certain range) and non-precisely defined. They are treated as linguistic variables, whose values are expressed by means of fuzzy numbers. The objective function to be minimised is: (a) the mean flow time cost plus the mean processing cost, and (b) the maximum flowtime cost plus the total processing cost. The problem is modelled as an assignment problem and is solved optimally with respect to the defuzzification strategy used.

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