Question: A key joint in a precision machining process has a lower specification limit of a width of 0.99 mm and an upper specification limit of

A key joint in a precision machining process has a lower specification limit of a width of 0.99 mm and an upper specification limit of 1.01 mm. The standard deviation is 0.005 mm and the mean is 1 mm. What is the process capability index for the precision machining process?

A) 0.01

B) 0.33

C) 0.67

D) 0.99

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