System, program and method for determining optimal lot size

摘要

An optimal lot size determining system according to the present invention, comprises an actual sales database for storing actual sales of an item, an item parameter database for storing parameters of the item, an item sales predicting device and an optimal lot size determining device. The item sales predicting device is connected with the actual sales database and/or the item parameter database and predicts sales of the item based on actual sales and/or parameters of the item. The optimal lot size determining device is connected with the item sales predicting device and the item parameter database, and obtains an inventory cost function of lot size of the item, for costs including costs for storage and interest and a handling cost function of lot size of the item, for costs at both sides of sending and receiving the item, based on sales predicted by the item sales predicting device and item parameters. The optimal lot size determining device further obtains a lot size of the item, minimizing a sum of the inventory cost and the handling cost, to determine an optimal lot size. Accordingly, use of a predicted value of sales of the item, allows a real-time optimization of lot size for minimizing a sum of costs.