Effect of Additional Order in Two-Stage Supply Chain Contract under the Demand Uncertainty

In this work, mathematical models are formulated in order to investigate the effect of additional on expected total profit a two-stage supply chain. A multi-period buyback contract between supplier and retailer under demand uncertainty is considered. Under contract, an advance submitted when unknown, can be made at beginning each period after previous realized. The impact coordination chain’s also results show that does not always increases chain profit. only both coordinated. decentralized system with tends less reduce risk. This leads higher cost due As result, it lowers Moreover, sensitivity analysis performed using numerical studies observe behavior