Measurements were taken for the workstation that tests the test machines; the data is: Mean 118.45 Standard Dev 0.25 Lower Spec 117.56 Upper Spec 119.82 Determine the capability index. (Keep four decimal places in your answer)
Expert Answer
Capability index = upper specification limit- x , x – lower specification limit / 3 alpha
= 119.82 – 118.45/(3)0.25 ,118.45 -117.56 /(3 ) 0.25
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