Cp and Cpk are considered short-term potential capability measures for a process. In Six Sigma we want to describe processes quality in terms of sigma because this gives us an easy way to talk about how capable different processes are using a common mathematical framework. In other words, it allows us to compare apple processes to orange processes! | Lean Six Sigma Global

Master Process Capability! I Cp, Cpk, Pp & Ppk Understanding I The Lean Six Sigma World