Cp, Cpk, Pp and Ppk

Question 1

What are Cp, Cpk, Pp and Ppk?

Answer 1

Cp, Cpk, Pp and Ppk are parameters (indices) that can measure process variation and can help manufacturers to determine process performance and capability.

Source: https://www.alisqi.com/

Question 2

What is the difference between Cp/Cpk and Pp/Ppk?

Answer 2

Cp and Cpk are used with stable, mature processes that are under statistical control. In contrast, Pp and Ppk are useful when analyzing performance in a pre-production run or a new process that is not yet under statistical control.

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Question 3

What do Cpk and Ppk denote?

Answer 3

The single number in Cpk or Ppk tell you all about how capable your process is in actually delivering a quality product.

Source: Source: https://www.alisqi.com/