Patent ID: 7783373

Claim:
A process debug method used to identify at least one excursive machine in a manufacturing process comprising: providing a plurality of machines used in a manufacturing process treating a plurality of end products, wherein each of the end products is treated in at least one of the machines; collecting a plurality of validity identification data one-to-one corresponding to the end products for determining if the end products are valid after the manufacturing process is performed, wherein each of the validity identification data has a score, and the end product corresponding thereto is invalid when the score is equal to a first determined value, and the end product corresponding thereto is valid when the score is equal to a second determined value; arranging the validity identification data of the end products for each of the machines in accordance with a sequence of the end products passing through the machine, thereby obtaining a validity identification data sequence for each of the machines; conducting a sorting process to cluster the machines into a plurality of groups in accordance with main functions of the machines; counting a number of the machines having at least one score which is equal to the first determined value in each of the groups, thereby obtaining a sorting parameter of each of the groups, wherein the sorting parameter indicates which group has the machines with a higher probability to result in invalid end products; conducting a continuity analysis on every two adjacent validity identification data in each of the validity identification data sequences in each of the groups, thereby outputting a continuity parameter for each of the machines; and identifying at least one excursive machine from the machines by ranking the sorting parameter of each of the groups and/or by ranking the continuity parameter of each of the machines.