Revision Date: 2005-09-06
| There is no authoritative answer. Cp has been around for a long time and many believe it stands for Capability of the Process. Others say Process Capability, but that would reverse the letters.
As for Cpk, in the literature that I first saw about Cpk, k was the amount of the difference in the target value and  in standard deviations (the number of standard deviations that the process is off target). Before you ask, Pp generally is said to be Process Performance.
Gordon Constable Ph.D. | |
