Title: Integrated inventory system with freight costs and two types of quantity discounts

Authors: Ivan Darma Wangsa; Hui Ming Wee

Addresses: Department of Industrial and Systems Engineering, Chung Yuan Christian University, Chungli, Taiwan ' Department of Industrial and Systems Engineering, Chung Yuan Christian University, Chungli, Taiwan

Abstract: In this paper, we investigate an integrated inventory model for single supplier-buyer considering stochastic demand. We consider two quantity discounts with freight environment. The objective is to minimise the integrated total cost incurred by the supplier and buyer. Freight costs are the function of shipping weight and distance with two transportation modes: truckload (TL) and less-than-truckload (LTL) shipments. We develop two optimal models considering all-units quantity discount and incremental quantity discount. The study shows how freight costs and the two discount policies affect the total cost of the supplier and the buyer. Numerical examples are used to illustrate of two models.

Keywords: integrated inventory; TL and LTL; stochastic demand; all-units quantity discount; incremental quantity discount.

DOI: 10.1504/IJLSM.2020.103851

International Journal of Logistics Systems and Management, 2020 Vol.35 No.1, pp.119 - 147

Received: 04 Jul 2017
Accepted: 24 Nov 2017

Published online: 28 Nov 2019 *

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