Question

The quality assurance manager is assessing the capability of a process that puts pressurized
grease in an aerosol can. The design specifications call for an average of 75 pounds per square
inch (psi) of pressure in each can with an upper tolerance limit of 80 psi and a lower tolerance limit
of 70 psi. A sample is taken from production and it is found that the cans average 76 psi with a
standard deviation of 5 psi. What is the capability of the process? Calculate all capability indices
and interpret their meanings.

Answer 1

Answer:

The quality assurance manager is assessing the capability of a process that puts pressurized

grease in an aerosol can. The design specifications call for an average of 75 pounds per square

inch (psi) of pressure in each can with an upper tolerance limit of 80 psi and a lower tolerance limit

of 70 psi. A sample is taken from production and it is found that the cans average 76 psi with a

standard deviation of 5 psi. What is the capability of the process? Calculate all capability indices

and interpret their meanings.