Method for analyzing variation causes of manufacturing process and system for analyzing variation causes of manufacturing process

A system for analyzing variation causes of manufacturing process, comprising:

• a collecting module, configured to acquire manufacturing process data of a plurality of products, wherein the manufacturing process data comprises a plurality of manufacturing process parameters and a product quality parameter corresponding to the products;
• an evaluation module, configured to use at least one of a non-probability based classifier and a probability based classifier to compute the manufacturing process data to acquire a contribution rate of each of the manufacturing process parameters;
• a determination module, configured to determine whether a classifier accuracy rate is greater than a threshold;
• and
• a comparison module, wherein if the classifier accuracy rate is greater than the threshold, the comparison module performs a deleting operation on the manufacturing process parameters to delete the manufacturing process parameter having a lowest contribution rate, and uses the at least one of the non-probability based classifier and the probability based classifier to compute the manufacturing process data to acquire the contribution rate of each of the manufacturing process parameters, wherein if the classifier accuracy rate is not greater than the threshold, the comparison module sets at least one of the manufacturing process parameters as at least one crucial manufacturing process parameter.