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Controlling inventories in omni/multi-channel distribution systems with variable customer order-sizes

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  • Berling, Peter
  • Johansson, Lina
  • Marklund, Johan

Abstract

The fast growth of e-commerce and omni/multi-channel retailing brings new challenges for efficient inventory management. One such challenge concerns service differentiation across channels when upstream central warehouses satisfy both direct customer demand and replenishment orders from downstream retailers. Motivated by industry collaboration, we address this issue by developing a combined stock method for control of one-warehouse-multiple-retailer inventory systems with direct customer demand at the central warehouse. The combined stock method, used for service differentiation at the central warehouse, may be described as a critical level policy. The computationally efficient heuristics we present are designed to deal with real-life one warehouse multiple retailer inventory systems characterized by highly variable customer order-sizes, (R,Q) policies at all stock points, and fill rate constraints. A numerical study, including real data from two different companies, illustrates that the heuristics perform well; offering near optimal solutions close to target fill rates, with significant opportunities to reduce total inventory costs compared to existing methods.

Suggested Citation

  • Berling, Peter & Johansson, Lina & Marklund, Johan, 2023. "Controlling inventories in omni/multi-channel distribution systems with variable customer order-sizes," Omega, Elsevier, vol. 114(C).
    • Handle: RePEc:eee:jomega:v:114:y:2023:i:c:s0305048322001529
    DOI: 10.1016/j.omega.2022.102745
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