The specifications for the diameter of a molded part are 10 mm ± 0.5 mm. The actual average and standard deviation from 250 parts sampled is 10.1 mm and 0.1 mm, respectively. What is the process capability as measured by Cp?
A. 0.84
B. 1.67
C. 0.60
D. 1.00
E. 1.01
B. 1.67
Explanation:
Cp = (10.5 ? 9.5) ÷ (6 × 0.1) = 1 ÷ 0.6 = 1.67
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