How do I compare the Cp/Pp and Cpk/Ppk?
Assume the original target is a Cpk or Ppk of 1.0
|If Cpk or Ppk is less than 1.0||If Cpk or Ppk is greater than 1.0|
|If Cp or Pp is less than 1.0||Variation in the process should be reduced.||Not mathematically possible. Check for an error in calculations.|
|If Cp or Pp is greater than 1.0||The process should be centered within its specifications.||Fine tune and improve the process continuously. Increase the Cpk target.|