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Minimising makespan of a batch processing machine with unequal job ready times using simulated annealing

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  • Leena Ghrayeb
  • Purushothaman Damodaran

Abstract

Batch processing machines can process multiple jobs simultaneously. Given a set of jobs with their processing times, ready times, and sizes, the objective is to minimise the makespan. Two interdependent decisions are required: group jobs to form batches and schedule batches on the machine. The processing and ready times of the batch depends on the composition of the batch. Batch ready time is equal to the largest ready time of all the jobs in a batch. Similarly, batch processing time is equal to the largest processing time of all the jobs in a batch. As the problem under study is NP-hard, a simulated annealing (SA) approach is proposed. The proposed approach is evaluated by comparing its solution quality and run time with a commercial solver used to solve a mathematical formulation. An experimental study shows that the SA approach is fast in finding good solutions as the problem size increases.

Suggested Citation

  • Leena Ghrayeb & Purushothaman Damodaran, 2023. "Minimising makespan of a batch processing machine with unequal job ready times using simulated annealing," International Journal of Industrial and Systems Engineering, Inderscience Enterprises Ltd, vol. 43(2), pages 222-237.
    • Handle: RePEc:ids:ijisen:v:43:y:2023:i:2:p:222-237
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