4.7 Article

Dynamic takt time decisions for paced assembly lines balancing and sequencing considering highly mixed-model production: An improved artificial bee colony optimization approach

Journal

COMPUTERS & INDUSTRIAL ENGINEERING
Volume 161, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cie.2021.107616

Keywords

Balancing; Sequencing; Paced assembly lines; Dynamic takt time; Artificial bee colony

Funding

  1. Local Special Projects Guided by the Central Government [2020L3002]
  2. National Key R&D Program of China [2020YFB1709901]
  3. National Natural Science Foundation of China [51975495]

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This paper introduces a method for balancing and sequencing in paced assembly lines planning based on dynamic takt time, and evaluates the effectiveness of the improved artificial bee colony algorithm. Analysis of case studies of different scales verifies the rationality of the dynamic takt time method.
Balancing and sequencing are two important problems in paced assembly lines planning. Many studies use a precedence graph to solve the problems. Fixed takt time (fTT) is used as the paced value of assembly lines, which ignores the real-time status of assembly lines. By analyzing the position of each product on the assembly lines and the working time of the current assembly, this paper proposes to use the maximum value of the working time of each product in the current status as the value of the dynamic takt time (dTT). This method utilizes the assembly line capacity more effectively. An improved artificial bee colony (iABC) algorithm is developed to optimize balancing and sequencing simultaneously. Compared with multi-objective particle swarm optimization and non-dominated sorting genetic algorithms II, the effectiveness of the iABC algorithm is evaluated according to three performance evaluation indexes including the inverted generational distance, the spacing metric, and the set coverage metric. Case studies of different scales and the effects of fTT and dTT on idle time are analyzed, verifying the rationality of the proposed dTT method.

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