New supply chain planning method based on coupling point inventory planning

We propose a new supply chain planning method based on coupling point inventory planning. This method is used for repetitive products at coupling point (CP). This method calculates the re-order quantity on the basis of the theoretical necessary inventory and calculates the out-of-stock warning on the basis of the future demand forecast. The theoretical necessary inventory is planned by the lead-time of the supply chain process, planning cycle, average demand quantity and its standard deviation. The re-order quantity is calculated by the difference of the theoretical necessary inventory and the measured actual stock. The out-of-stock warning is planned by the on-hand inventory and the accuracy estimation demand. As a result, the total inventory level of supply chain process becomes flat by theoretical necessary inventory, and the out-of-stock situation of the downstream company is avoided by the out-of-stock warning.