Makespan minimisation on parallel batch processing machines with non-identical job sizes and release dates

Onur Ozturk 1 Marie-Laure Espinouse 2 Maria Di Mascolo 1 Alexia Gouin 3
1 G-SCOP_GCSP - GCSP
G-SCOP - Laboratoire des sciences pour la conception, l'optimisation et la production
2 G-SCOP_ROSP - ROSP
G-SCOP - Laboratoire des sciences pour la conception, l'optimisation et la production
3 GIPSA-SAIGA - SAIGA
GIPSA-DA - Département Automatique, GIPSA-DIS - Département Images et Signal
Abstract : The problem we study in this paper arises from the washing step of hospital sterilisation services. Washers in the washing step are capable of handling more than one medical device set as long as their capacity is not exceeded. The medical device set sizes and arrival times to the sterilisation service may be different, but they all have the same washing duration. Thus, we model the washing step as a batch scheduling problem where medical device sets are treated as jobs with non-identical sizes and release dates, but equal processing times. The main findings we present in this paper are the following. First, we study two special cases for which polynomial algorithms are presented. We then develop a 2-approximation algorithm for the general problem. Finally, we develop a MILP model and compare it with another MILP model from the literature. Computational results show that our MILP model outperforms the model from the literature.
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Onur Ozturk, Marie-Laure Espinouse, Maria Di Mascolo, Alexia Gouin. Makespan minimisation on parallel batch processing machines with non-identical job sizes and release dates. International Journal of Production Research, Taylor & Francis, 2012, 50 (20), pp.6022-6035. ⟨10.1080/00207543.2011.641358⟩. ⟨hal-00677220⟩

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