The process capability measures Cp and Cpk differ because:
A)only one ensures the process mean is centered within the limits.
B)Cp values above 1 indicate a capable process,while Cpk values above 2 indicate a capable process.
C)They do not differ: both are identical.
D)Cp values for a given process will always be greater than or equal to Cpk values.
E)Both A and D are correct.

Question

Quizplus · Accepted Answer

Cp measures the process capability when the process is centered within the specification limits and does not consider the location of the process mean. On the other hand, Cpk measures the process capability while taking into account the location of the process mean relative to the specification limits. Therefore, both options A and D are correct, making option E the best choice. Option B is incorrect because Cp values above 1 do not always indicate a capable process, and Cpk values above 2 do not always indicate a capable process either. The acceptable values for Cp and Cpk depend on the specific process and the customer's requirements. Option C is also incorrect because Cp and Cpk measure different aspects of process capability.

The Process Capability Measures Cp and Cpk Differ Because