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

Question

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A) Cp does not ensure the process mean is centered within the limits, while Cpk does, considering the location of the mean. D) Cp values are generally higher than Cpk values because Cpk also accounts for the centering of the process distribution, which can reduce its value if the process mean is off-center.

The Process Capability Measures Cp and Cpk Differ Because

The Process Capability Measures C_p and C_pk Differ Because