But, as long as you can keep the process between 75% of the tolerance, and you are capable to at least 1.33 [capability=(USL-LSL)/(UCL-LCL)].
This 75% is at the center of the width of USL and LSL?
When you submit PPAP with the capability study, capability of 1.33 is acceptable by the customer instead of 1.67 using your method?
Using [capability=(USL-LSL)/(UCL-LCL)] in this method, we do not calculate the smaller of (USL - mean)/3s or (mean - LSL)/3s? If (UCL-LCL) is not in the center of (USL-LSL), is it acceptable by the customer?
Please teach me, thank you!