Question: The lower and upper specification limits for a component are 3.98 and 4.02 inches, respectively. The process standard deviation is .004, and the process average

The lower and upper specification limits for a component are 3.98 and 4.02 inches, respectively. The process standard deviation is .004, and the process average is 4.005 inches.

a) What is the Process Capability Index?

b) What is the Process Capability Ratio?

c) Interpret the results above. Do the Process Capability Index and Process Capability Ratio meet 4-sigma level? (the four-sigma performance target value is 1.33)

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