Two Methods In Identifying A Type Of PerMIA

Two Methods in Identifying A Type Of PerMIAIn the 1970s', Japanese quality expert G.Taguchi, proposed parameter design method. He use signal-to-noise ratio as the measure of variation. Then the two steps procedures can be used to find the best arrangement.In 1987, Leon, Shoemaker and Kacker of AT&T Bell Laboratories extended SN ratio, and proposed the conception of PerMIA(Performance Measures Independent of Adjustment). PerMIA is an important extension of SN ratio. Aiming at a common class of PerMIA, Nair proposed the log//-logo2graph to estimate the PerMIA measure and to recognize adjustment factor with experiment data directly. After simulation, we find that these two methods have limitation. In this paper , to estimate PerMIA and to identify adjustment factors, we give Gamma-graph Method and Standard Gamma-graph Method.