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Developing Inventory Control Policies with No Ordering Costs in Two-Echelon Supply Chains
, Ph.D. Dissertation Sharif University of Technology ; Haji, Rasoul (Supervisor)
Abstract
This dissertation attempts to develop four inventory control models for two-echelon supply chains. For the all models, the retailers face Poisson demand and lost sales during a stockout. There is also a time-dependent holding cost and a cost per unit of lost sales. However, there is no (or negligible) cost associated with placing an order.
For the first model, we consider a two-echelon inventory system with one central warehouse and a number of retailers. The central warehouse applies (R, Q) policy and retailers apply base stock policy. In this model, we approximate the arrival process of the central warehouse and obtain the total cost of the system, as well as the optimal solution....
For the first model, we consider a two-echelon inventory system with one central warehouse and a number of retailers. The central warehouse applies (R, Q) policy and retailers apply base stock policy. In this model, we approximate the arrival process of the central warehouse and obtain the total cost of the system, as well as the optimal solution....
Joint order (1, T) policy for a two-echelon, single-item, multi-retailer inventory system with Poisson demand
, Article Computers and Industrial Engineering ; Volume 119 , 2018 , Pages 353-359 ; 03608352 (ISSN) ; Haji, R ; Ghalebsaz Jeddi, B ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
This study considers a two-echelon inventory system with one central warehouse and a number of non-identical retailers with Poisson demands, constant lead times, and lost sales for a single item. The warehouse works as a cross-docking terminal with no inventory and coordinates shipments to retailers. We apply the Joint order (1, T) policy in such an inventory system. In the standard (1, T) policy, the warehouse sends one unit of the item to each retailer in a fixed cycle time, which is calculated by considering each retailer separately. In the joint order (1, T) policy, the warehouse decides to replenish one unit of the item for each retailer in a cycle time which is adjusted to be an...