Question: A process mean is shifted from its target value by 1.0 sigma units. Using process improvement methods, you are able to adjust the process so

A process mean is shifted from its target value by 1.0 sigma units. Using process improvement methods, you are able to adjust the process so that its mean value becomes exactly centered on target. Assume the standard deviation of the process is unchanged. Therefore, which of the following must be true?

a. The Cpk value increased.

b. The Cpk value decreased.

c. The Cp value increased.

d. The Cp value decreased.

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