Stochastic joint replenishment problem with quantity discounts and minimum order constraints

Ji Seong Noh (), Jong Soo Kim () and Biswajit Sarkar ()
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Ji Seong Noh: Hanyang University
Jong Soo Kim: Hanyang University
Biswajit Sarkar: Hanyang University

Operational Research, 2019, vol. 19, issue 1, No 7, 178 pages

Abstract: Abstract This paper analyzes a logistics system involving a supplier who produces and delivers multiple types of items and a buyer who receives and sells to end customers. The buyer controls the inventory of each item by ordering at a preset time interval, which is an integer multiple of a base cycle, to meet the stochastic demands of the end customers. The supplier makes contracts with the buyer that specify that the ordered amount is delivered at the start of each period at a unit price determined by a quantity discount schedule. The contract also specifies that a buyer’s order should exceed a minimum order quantity. To analyze the system, a mathematical model describing activities for replenishing a single type of item is developed from the buyer’s perspective. An efficient method to determine the base cycle length and safety factor that minimizes the buyer’s total cost is then proposed. The single item model is extended to a multiple items joint replenishment model, and algorithms for finding a cost-minimizing base cycle, order interval multipliers, and safety factors are proposed. The result of computational experiments shows that the algorithms can find near-optimal solutions to the problem.

Keywords: Inventory control; Joint replenishment problem; Quantity discount; Minimum order quantity (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (13)

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DOI: 10.1007/s12351-016-0281-6

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