Studies on a machine that molds plastic water pipe indicate that when it is injecting 1-inch diameter pipe, the process standard deviation is 0.05 inches. The one-inch pipe has a specification of 1-inch plus or minus 0.10 inch. What is the process capability index (Cp)? Assume the process mean is centered?

From your calculations in the previous question what conclusion can we draw about the process?

A. The process is capable

B. The process is not capable

C. The process is in control

D. The process is somewhat in control

E. No conclusion can be draw.