Title: Effects of supply disruption on optimal inventory policy: the case of (r, S) continuous review inventory policy

Authors: Chirakiat Saithong; Huynh Trung Luong

Addresses: Department of Industrial Systems Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, 12120, Thailand ' Department of Industrial Systems Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, 12120, Thailand

Abstract: In this study, we focus on the derivation of an optimal inventory policy to help tackle the supply disruption problem. The main objective of the study is to derive an optimal inventory policy for a retailer who is facing stochastic supply disruption and stochastic demand, operating under a (r, S) continuous review policy so as to minimise the total inventory cost per time-unit. Renewal reward theorem is used to help develop the total inventory cost function which consists of order cost, time-dependent holding and shortage costs in the existence of replenishment lead time. Numerical experiments and sensitivity analyses are then conducted to illustrate the applicability of the developed inventory policy.

Keywords: supply disruption; continuous review inventory policy; stochastic demand; renewal reward process; expected path approach.

DOI: 10.1504/IJISE.2020.108550

International Journal of Industrial and Systems Engineering, 2020 Vol.35 No.4, pp.482 - 508

Received: 10 Jul 2018
Accepted: 10 Jan 2019

Published online: 17 Jul 2020 *

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