Method and System for Statistical Equivalence Test

A method for a statistical equivalence test includes the steps of: collecting and preprocessing process data; testing statistical equivalence by considering a statistical tolerance for the collected process data; and finally determining the equivalence by referring to the common technology determination database of process engineers after the statistical equivalence test. Wherein, the common technology determination database of the process engineers is made up of equivalence determination reference values which are objectified by the statistical process of measured technology determination results after measuring the technology determination results of the process engineers to equivalence/difference/improvement levels.