Scheduling in a no-wait flow shop to minimise total earliness and tardiness with additional idle time allowed

Scheduling jobs in a no-wait flow shop with the objective of minimising total earliness and tardiness is the problem addressed in this paper. Idle time may be needed on the first machine due to the no-wait restriction. A model is developed that shows additional idle can be inserted on the first mach...

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Bibliographic Details
Published in:International journal of production research 2022-09, Vol.60 (18), p.5488-5504
Main Authors: Schaller, Jeffrey, Valente, Jorge M. S.
Format: Article
Language:English
Subjects:
earliness and tardiness
flow shop
heuristics
Idling
Insertion
Lateness
no-wait
Scheduling
Tightness
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Summary:Scheduling jobs in a no-wait flow shop with the objective of minimising total earliness and tardiness is the problem addressed in this paper. Idle time may be needed on the first machine due to the no-wait restriction. A model is developed that shows additional idle can be inserted on the first machine to help reduce earliness. Several dispatching heuristics previously used in other environments were modified and tested. A two-phased procedure was also developed, estimating additional idle in the first phase, and applying dispatching heuristics in the second phase. Several versions of an insertion improvement procedure were also developed. The procedures are tested on instances of various sizes and due date tightness and range. The results show the two-phase heuristics are more effective than the simple rules, and the insertion search improvement procedure can provide considerable improvements.
ISSN:0020-7543
1366-588X
DOI:10.1080/00207543.2021.1962017