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The effect of buffers and work sharing on makespan improvement of small batches in assembly lines under learning effects

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  • Yossi Bukchin
  • Efrat Wexler

Abstract

The effect of workers’ learning curves on the production rate in manual assembly lines is significant when producing relatively small batches of different products. This research studies this effect and suggests applying a work-sharing mechanism among the workers to improve the makespan (time to complete the batch). The proposed mechanism suggests that adjacent cross-trained workers will help each other in order to reduce idle times caused by blockage and starvation. The effect of work sharing and buffers on the makespan is studied and compared with a baseline situation, where the line does not contain any buffers and work sharing is not applied. Several linear programming and mixed-integer linear programming formulations for makespan minimization are presented. These formulations provide optimal work allocations to stations and optimal parameters of the work-sharing mechanism. A numerical study is conducted to examine the effect of buffers and work sharing on the makespan reduction in different environment settings. Numerical results are given along with some recommendations regarding the system design and operation.

Suggested Citation

  • Yossi Bukchin & Efrat Wexler, 2016. "The effect of buffers and work sharing on makespan improvement of small batches in assembly lines under learning effects," IISE Transactions, Taylor & Francis Journals, vol. 48(5), pages 403-414, May.
    • Handle: RePEc:taf:uiiexx:v:48:y:2016:i:5:p:403-414
    DOI: 10.1080/0740817X.2015.1056392
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