to answer the following question; Briefly describe the difference between CP and CPK and why we use these. does this answer it correctly?; Difference:

Cp measures the potential capability of a process assuming it is perfectly centered between the specification limits$.$

Cpk measures the actual capability of a process, taking into account any shift in the process mean from the center.

In$-$text citation example: According to Morgan $(2024)$ and Hessing $($n$.$d$.),$ Cp and Cpk are used to evaluate process capability, with Cp focusing on potential capability and Cpk on actual performance $($Morgan$,2024,$ p$.214).$