We study an inventory system with multiple supply sources and expediting options. The replenishment lead times from each supply source are stochastic, representing congestion and disruption. We construct a family of smart ordering and expediting policies that utilize real-time supply...

We consider a single-product, two-source inventory system with Poisson demand and backlogging. Inventory can be replenished through a normal supply source, which consists of a two-stage tandem queue with exponential production time at each stage. We can also place an emergency order by skipping...

A product recall is very expensive and a poorly executed recall can be devastating to a company's reputation. It is therefore important to improve the traceability for supply chains to address potential recalls. This paper studies the recall dynamics in a two-stage supply chain with a...