2. Process capability

2-1. A process that produces computer chips has a mean of .04 defective chips and a standard deviation of .003 chips. The allowable variation is from .033 to .047 defective.

a. Compute the capability index (C_p) for the process. (Round your answer to 2 decimal places.)

b. Is the process capable? (Hint: Use 1 as the standard capability index.)

2-2. An appliance manufacturer wants to contract with a repair shop to handle authorized repairs in Indianapolis. The company has set an acceptable range of repair time of 50 minutes to 90 minutes. Two firms have submitted bids for the work. In test trials, one firm had a mean repair time of 74 minutes with a standard deviation of 4.0 minutes and the other firm had a mean repair time of 72 minutes with a standard deviation of 5.1 minutes. Compute the capability index (C_pk) for each firm. Is the process capable? (Round your answer to 2 decimal places.)