Question: In Problem, the design specification on the part is that the diameter = 30.000 ± 0.150 mm.

(a) What proportion of parts fall outside the tolerance limits?

(b) If the process is adjusted so that its mean diameter = 30.000 mm and the standard deviation remains the same, what proportion of parts fall outside the tolerance limits?

Problem: A turning process is in statistical control and the output is normally distributed, producing parts with a mean diameter = 30.020 mm and a standard deviation = 0.040 mm. Determine the process capability.