Patent ID: 6415260
Filing Date: 2002-07-02
Classification: G05B,G06Q

Abstract:
A dynamic forecast method of capacity demand for providing tool capacity demand on a processing line by daily stage moves forecast, said method comprising the steps of:a. assigning a work in process Wijk (WIP) of product i at stage j in said processing line in day k, said processing line including n numbers of stages, said stage having a turn ratio Tijk; b. determining a stage move Mijk of the product i at the stage j in the day k by the steps of: i) multiplying a decimal of said turn ratio by a work in process of every stage from stage 1 to stage j; ii) calculating the summation of each term multiplied by step i); c. revising said stage move Mijk to determine an actual stage move Mâ€²ijk according to said Wijk, wherein said actual stage move Mâ€²ijk is less than or equal to the stage move of previous stage Mi(jâˆ’1)k plus said Wijk; and d. determining a work in process Wij(k+1) of the product i at the stage j in day k+1 by calculating the summation of said Wijk and an actual stage move Mâ€²i(jâˆ’1)k of previous stage minus said actual stage move Mâ€²ijk.