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Scheduling optimisation of a real flexible job shop including fixture availability and preventive maintenance

Author

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  • Karin Thörnblad
  • Ann-Brith Strömberg
  • Michael Patriksson
  • Torgny Almgren

Abstract

The multitask cell at GKN Aerospace Sweden is a flexible job shop containing ten resources aimed at being flexible with regard to product mix and processing types. We present a time-indexed formulation of the problem of optimally scheduling the planned jobs on the resources, also considering a limited availability of fixtures as well as required preventive maintenance activities. The objective is to minimise a weighted sum of the completion times and tardiness for the jobs, where the tardiness weight for a given job is a non-increasing function of its due date. We propose a fast iterative approach to finding a suitable value of the length of the time horizon that needs to be set for the time-indexed formulation and which considerably influences the computation time. Computational results show that the method developed is able to produce optimal, or near-optimal, schedules for real data instances within an acceptable practical time frame. [Received 1 October 2012; Revised 13 May 2013; Accepted 20 September 2013]

Suggested Citation

  • Karin Thörnblad & Ann-Brith Strömberg & Michael Patriksson & Torgny Almgren, 2015. "Scheduling optimisation of a real flexible job shop including fixture availability and preventive maintenance," European Journal of Industrial Engineering, Inderscience Enterprises Ltd, vol. 9(1), pages 126-145.
    • Handle: RePEc:ids:eujine:v:9:y:2015:i:1:p:126-145
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    Cited by:

    1. Song Jiu, 2021. "A two-phase approach for integrating preventive maintenance with production and delivery in an unreliable coal mine," Journal of Heuristics, Springer, vol. 27(6), pages 991-1020, December.

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