Hello,
Excuse me because my question is probably stupid.
A customer would like to do a control chart with Levey Jennings calculation for Sigma limits.
When you do that, the Cpk is the equivalent to the Ppk. Why?
as the control chart is based on long terme, you can't have a CpK information on the same report?
Thank you for the details you can give me as it is not completly clear for me.
Florence
