Managing Supply Chain and Operations 1st Edition by Thomas Foster ,Scott Sampson,Cynthia Wallin,Scott Webb

Exercise 18

A machine is designed to fill bottles to between 16.01 and 15.98 ounces. Thirty samples of bottles filled by the machine were randomly selected from the process. The sample bottles yielded a grand mean (?) of 15.99 and a standard deviation of 0.0025. Calculate the process capability index for the bottle-filling machine and comment on its capability.