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Unequal area facility layout problem-solving: a real case study on an air-conditioner production shop floor

Author

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  • Wei Guo
  • Pingyu Jiang
  • Maolin Yang

Abstract

Solving facility layout problems aims at identifying the optimal plan for placing a number of facilities or departments on a shop floor considering multiple optimisation criteria and constraints. Recently, the unequal area facility layout problem (UA-FLP) has drawn more attention as it is closer to real industrial scenarios. To address this problem, the typical UA-FLP in an air-conditioner production shop floor is analysed, and then a modified non-dominated sorting genetic algorithm (NSGA-II) is developed to identify the optimal layout plan considering the material handling cost (MHC) and the closeness rating score (CRS). NSGA-II is a stable algorithm for engineering applications and has an encoding structure of chromosomes that can express facility layout expediently. Besides that, the two objectives (MHC and CRS) that are conflicting might be another reason for adopting NSGA-II. During the process, the crossover and mutation operators of NSGA-II are modified based on the non-overlapping method, which reduces the time cost for eliminating unsuitable layout plans. The modified NSGA-II is compared with two related algorithms, and the results show that it has better performance on the UA-FLP with a large number of departments.

Suggested Citation

  • Wei Guo & Pingyu Jiang & Maolin Yang, 2023. "Unequal area facility layout problem-solving: a real case study on an air-conditioner production shop floor," International Journal of Production Research, Taylor & Francis Journals, vol. 61(5), pages 1479-1496, March.
    • Handle: RePEc:taf:tprsxx:v:61:y:2023:i:5:p:1479-1496
    DOI: 10.1080/00207543.2022.2037778
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