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Flow shop scheduling with two machines

Authors: Adusumilli, V. L. Kumar;

Flow shop scheduling with two machines

Abstract

A flow shop problem has n jobs (i = 1. , n) on m machines (j = 1, . . . , m) and a job consists two operations and the jth operation of each job must be processed on machine j. Any job can start only on machine j if it is completed on machine j-1 and if machine j is free. Each operation has a known processing time pij. The work here focuses on the case m = 2 where the objective is to minimize (1) the makespan (Cmax) and (2) the average completion time (sumCi); We first review an efficient greedy algorithm by Johnson for Cmax and give detailed proofs; The we note that in the case of sumCi the problem is harder, in fact it is NP-hard. To tackle this problem we have implemented a branch and bound algorithm to find the optimal schedules in some cases. We also constructed a genetic algorithm under MIT's GALib C++ package. Solutions from the branch and bound algorithm are used as benchmarks for the solutions found by the genetic algorithm.

Country
United States
Related Organizations
Keywords

Flow, Scheduling, Shop, Machines

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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