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Also the GRR% of tol, how canI estimate from the misclassification rates are for various Pp,Ppk's? Can I just move in from the LSL & USL by the GRR% and calculate using a cumalutive normal estinate in Minitab to estimate ppm?

For example for GRR% of Tol is 30% and spec is 1 unit wide, would I move 0.3 from either spec and estimate using mintabs cumlative normal function to estimate ppm?

Any help / advice glady accepted, THANKS!!