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- W3210136598 abstract "In this paper we investigate a problem associated with operating a robotic mobile fulfilment system (RMFS). This is the problem of allocating orders and mobile storage racks to pickers. We present a two-stage formulation of the problem. In our two-stage approach we, in the first-stage, deal with the orders which must be definitely fulfilled (picked), where the racks chosen to fulfil these first-stage orders are chosen so as to (collectively) contain sufficient product to satisfy all orders. In the second-stage we restrict attention to those racks chosen in the first-stage solution in terms of allocating second-stage orders. We present three different strategies for first-stage order selection; one of these strategies minimises the requirement to make decisions as to the rack sequence (i.e.~the sequence in which racks are presented to each picker). We present a heuristic procedure to reduce the number of racks that need to be considered and too present a heuristic for order and rack allocation based on partial integer optimisation that makes direct use of our two-stage formulation. Extensive computational results are presented for test problems that are made publicly available." @default.
- W3210136598 created "2021-11-08" @default.
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- W3210136598 date "2021-10-22" @default.
- W3210136598 modified "2023-09-26" @default.
- W3210136598 title "A two-stage approach for order and rack allocation in a mobile rack environment" @default.
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