What is the difference between Cp, Cpk and Ppk?

[Enrique]

Please help me on this,
Which is the diference between CP, CPK and PPK?????
Regards

 

[Jim Wynne]

Please help me on this,
Which is the diference between CP, CPK and PPK?????
Regards

Here's a good place to start: What is Process Capability?

 

[Marc]

Actually, that question has been asked here many times, and answered. A simple search here in the forums would give you these threads and many more:

The visual: Capability Analysis - Process Capability Indices

Some threads:
What is the difference between Ppk and Cpk
SPC - Capability Analysis - Cp Cpk Pp and Ppk Definitions
Could anyone tell me what is relation / difference in Cpk and Ppk
Ppk or Cpk - Preliminary Process Capability vs. Process Performance
Is Cpm (Taguchi's Index) Superior to Cpk and Ppk?
Cpk vs. Ppk - Long Term vs. Short Term - Capability vs. Stability

These are a few of many threads here where the relationship is discussed.