Now let's suppose we make changes to the process and now the process mean is 1-inch diameter and everything else stays the same: that is; the process standard deviation is still 0.04 inches. The customers define a good quality pipe as one having a diameter of one-inch with a tolerance of plus or minus 0.20 inch. What level of quality does the process currently deliver?

2 Sigma

3 Sigma

4 Sigma

5 Sigma

6 Sigma

None of the above