Minimising makespan in flowshop group scheduling with sequence-dependent family set-up times using inserted idle times

J.S. Neufeld, J.N.D. Gupta and U. Buscher

International Journal of Production Research, 2015, vol. 53, issue 6, 1791-1806

Abstract: This paper focuses on the permutation flowshop group scheduling problem to minimise makespan, which is typically found in flowline manufacturing cells. In contrast to classical flowshop scheduling, it is characterised by a scheduling task at two levels: on the one hand, jobs within part families and on the other hand, a number of part families have to be sequenced. Integrating sequence-dependent set-up times for every changeover of families, this problem can represent practical cases. By modelling each family as a job with time lags, some specific problem characteristics of the group scheduling problem are pointed out. It is shown that generating job sequences by minimising the sum of inserted machine idle times instead of makespan on the first level of scheduling and the use of the schedule heads on the second level can lead to significant improvements for some test problems. These findings are used for the improvement of existing constructive heuristic algorithms, whose effectiveness is assessed for several test instances with sequence-dependent family set-up times.

Date: 2015
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Citations: View citations in EconPapers (3)

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DOI: 10.1080/00207543.2014.961209

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