Calculate the standard deviation ( ): = min ( Nominal 3 , Nominal 3 ) Cpk=min( 3 USLNominal , 3 NominalLSL ) 0.85 = min ( 9 5 3 , 5 1 3 ) 0.85=min( 3 95 , 3 51 ) 0.85 = min ( 4 3 , 4 3 ) 0.85=min( 3 4 , 3 4 ) 0.85 = 4 3 0.85= 3 4 = 4 3 0.85 = 30.85 4 1.57 1.57 Determine the Z-score corresponding to half of the specification limits: Half of Spec Limit = USL Nominal 2 = 9 5 2 = 2 Half of Spec Limit= 2 USLNominal = 2 95 =2 = Half of Spec Limit = 2 1.57 Z= Half of Spec Limit = 1.57 2 1.27 Z1.27