Abstract: In order to build an applied system, this paper gives an inventory model algorithm, cost-comparing mode, which is designed for the case of definitive discrete demand. On the basis of this mode and other inventory m odels, a decision support system (DSS) for inventory management is designed and implemented, which can answer the question of optimizing inventory, and provide the inventory decision-maker with the function of powerful decision support

Key words: inventory model, decision support system, inventory optimization