An in-control process has an estimated standard deviation of 2 mm. The specification limits of the component being processed are 120 ± 8 mm. When the process mean shifts to 118 mm, the values of the process capability indices, Cp and Cpk , respectively are,
1
1.000, 1.667
2
1.333, 1.667
3
1.333, 1.000
4
1.000, 1.000