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Climbing depth-bounded discrepancy search for solving hybrid flow shop problems

Author

Listed:
  • Abir Ben Hmida
  • Marie-Jose Huguet
  • Pierre Lopez
  • Mohamed Haouari

Abstract

This paper investigates how to adapt some discrepancy-based search methods to solve Hybrid Flow Shop (HFS) problems in which each stage consists of several identical machines operating in parallel. The objective is to determine a schedule that minimises the makespan. We present here an adaptation of the Depth-bounded Discrepancy Search (DDS) method to obtain near-optimal solutions with makespan of high quality. This adaptation for the HFS contains no redundancy for the search tree expansion. To improve the solutions of our HFS problem, we propose a local search method, called Climbing Depth-bounded Discrepancy Search (CDDS), which is a hybridisation of two existing discrepancy-based methods: DDS and Climbing Discrepancy Search (CDS). CDDS introduces an intensification process around promising solutions. These methods are tested on benchmark problems. Results show that discrepancy methods give promising results and CDDS method gives the best solutions. [Received 27 October 2006; Revised 27 February 2007; Accepted 8 March 2007].

Suggested Citation

  • Abir Ben Hmida & Marie-Jose Huguet & Pierre Lopez & Mohamed Haouari, 2007. "Climbing depth-bounded discrepancy search for solving hybrid flow shop problems," European Journal of Industrial Engineering, Inderscience Enterprises Ltd, vol. 1(2), pages 223-243.
    • Handle: RePEc:ids:eujine:v:1:y:2007:i:2:p:223-243
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