Coordinating replenishments in a supply chain with quality control considerations

We study the impact of coordinated replenishment, a popular supply chain in itiative, on a quality control system. We use the (Q; S) policy to manage a two-item inventory control system. If the items are jointly replenished, t he number ordered for each item varies from lot to lot. As the number varie s, the sampling plan will also be changed. Companies have to determine samp ling plans to minimize quality cost when the order is mixed with several it ems and the number of each item varies from order to order. Management's pr imary concern is to determine the optimal sampling sizes and acceptance num bers for all items in an order.