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Robustness of cyclic schedules for the charging of batteries

Published online by Cambridge University Press:  17 February 2009

Simon Dunstall
Affiliation:
CSIRO Mathematical and Information Sciences, Private Bag 33, Clayton South 3169, Australia; e-mail: Simon.Dunstall@csiro.au.
Graham Mills
Affiliation:
CSIRO Mathematical and Information Sciences, Private Bag 2, Glen Osmond 5064, Australia; e-mail: Graham.Mills@bigpond.com.
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Abstract

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In 2002 the Mathematics in Industry Study Group (MISG) investigated the question of optimally scheduling cyclic production in a battery charging and finishing facility. The facility produces various types of battery and the scheduling objective is to maximize battery throughout subject to achieving a pre-specified product-mix. In this paper we investigate the robustness of such schedules using simulation experiments that span multiple production cycles. We simulate random variations (delays) in battery charging time and find that an optimal off-line schedule yields higher throughput in comparison to a common on-line dispatching rule. This result has been found to hold for a range of expected charging-time delays and has significant practical implications for scheduling battery charging and finishing facilities.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2007

References

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