1. A company orders handmade ties from a silk weaver and requires the width of the ties to between 3 inches and 3.3 inches. The handmade ties are made by artisans who can produce ties with a mean of 3.1 inches and standard deviation of 0.01 inch. The process capability index for the tie making process is:

a.5

b.10

c.6.66

d.3.33

Process Capability Ratio Co USL - LSL USL: Upper Service Level 6.5 LSL: Lower Service Level S: Standard Deviation If Cp = 1.67 For non-critical measurements, CA >= 1.50 Six Sigma quality requires C 3= 2.0