This paper considers a closed-loop supply chain comprising one retailer and two suppliers. It assumes one supplier as the main supplier and another as the backup. The coordination issue of the supply chain has been discussed in this work. The main supplier's yield is considered subject to disruption. The demand considered here is stochastic. We aim to calculate the supplier's optimum production quantity. Similarly, the retailer's optimal ordering quantity is found out. Additionally, in the centralized supply chain model, we want to maximize the expected profit under certain restriction. Numerical illustrations are discussed to the benefit some characteristic insights over the supply chain model.

本文考虑了一个由一个零售商和两个供应商组成的闭环供应链。它假定一个供应商作为主要供应商，另一个供应商作为备用供应商。本文讨论了供应链的协调问题。主要供应商的产量被认为会受到干扰。这里考虑的需求是随机的。我们的目标是计算供应商的最佳生产数量。类似地，零售商的最优订货量也被找出来。另外，在集中式供应链模型中，我们希望在一定的约束条件下最大化期望利润。讨论了数值说明，以有益于对供应链模型的一些特征性见解。