• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (10): 427-438.doi: 10.3901/JME.2025.10.427

Previous Articles    

Theories and Methods of Non-improved Neighbouring Solution Recognition in Job-shop Scheduling

HUANG Xuewen, WANG Qiang, CHEN Zhen   

  1. School of Economics and Management, Dalian University of Technology, Dalian 116024
  • Received:2024-05-20 Revised:2024-12-23 Published:2025-07-12

Abstract: In solving the job-shop scheduling problem(JSP) using local search algorithms, accurately identifying improved and non-improved neighboring solutions within the neighborhood can enhance computational efficiency. To this end, a decision theorem for identifying improved and non-improved neighboring solutions is proposed. This theorem extends traditional decision theories, enabling more precise identification of improved and non-improved neighboring solutions. Considering that the proposed decision theorem requires high-cost exact algorithms, a low-cost method for identifying non-improved neighboring solutions is further developed for commonly used neighborhood structures, such as N1, N4, N5, N6 and N7. It can realize the rapid identification of non-improved neighbouring solutions without really performing the move resulting in the neighbouring solution. The experimental results show that, although it may not be possible to fully identify all non-improved neighbouring solutions in the neighbourhood, the proposed method can screen out 36.12%-94.92% of non-improved neighboring solutions. Moreover, without compromising solution quality, it significantly improves the computational efficiency of local search algorithms.

Key words: non-improved neighbouring solution, neighborhood structure, local search, job-shop scheduling

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