Abstract
In the effective supply chains development, the interaction between financial and inventory decisions is important for suppliers and manufacturers. In addition, implementing effective coordination between supply chain participants has become a related research issue. Considering a two-echelon model of multi-suppliers and one manufacturer in this study, coordinate their situations to maximize the total supply chain profits. One or more components required for the final product produced are provided by each supplier. The payments which are permissible delay is coordinated to order quantity between two echelons in the proposed inventory level model. This study is to establish an integrated inventory model to minimize the joint total expected inventory cost and develop a decision support system (DSS).