Journal
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
Volume 57, Issue 20, Pages 6552-6568Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207543.2019.1567948
Keywords
logistics systems; bucket brigade order picking; batch window; batch picking; picker capability
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The blocking mitigation mechanism contained in a batching and sequencing model improves order picking performance in bucket brigade order picking systems by adjusting the batch formation in a given batch window. The batch formation of a given batch window affects the transition to the next batch window and limits the batch formation's structure in the next window. In addition, imbalance in picker capability increases the variation of batch formation while mitigating blocking delay. Our paper proposes a dynamic indexed batching model to smooth the transition between consecutive batch windows and give a better approximation of non-identical pickers' capability. We develop a mixed integer programming solution for a dynamic indexed batching model in a bucket brigade order picking system (DIBMB). Simulation experiments show that the DIBMB smooths the transition between batch windows as measured in the delay experienced by the first batch in each batch window. Comparisons to the available batching models show that under DIBMB, the blocking delay gradually increases throughout the sequence of batches.
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