Scheduling changes on the production floor are common in practice. These changes
are aimed to meet the consumer demand, but they cause nervousness. Moreover, the
nervousness will increase costs and reduce service level. This research deals with production
batch size and buffer stock. It also considers to any changes in the preliminary order. Any
changes in the demand for a given day are announced one day before and it happends randomly.
This research considers two-echelon supply chain system with a single supplier and a single
manufacturer. The models development are transactional relationship and consignment stock
contract relationship. Additionally, this study also considers backorder and production capacity
according to the real condition. Numerical examples are given to demonstrate the performance of
the models. From the numerical results, it appears that coefficient variation (CV) of the demand
affects the results obtained using method of Silver-Meal(SM) and Least Unit Cost (LUC).