Question: You have an assembly process that yields a final dimension that is to be controlled. The target value for this dimension is 7 5 mm

You have an assembly process that yields a final dimension that is to be controlled. The target value for this dimension is 75 mm. You also note that the design specifications are not symmetric, but instead given by X*=75+2/-3. Upper specification limit equals USL=77 and lower specification limit equals LSL=72. Process measurements show that for every 20,000 parts produced you are seeing 17 parts out of specification, with a nearly even split between parts being above the upper specification limit and below the lower specification limit. They also give a standard deviation of 0.75, what would be the corresponding value for process capability CP and CPK.

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