The upper and lower specification limits for a component are 0.150 cm. and 0.120 cm., respectively. The process standard deviation is 0.003 cm. and the process average is 0.138 cm. What conclusion can be drawn?
A) The specifications should be changed to 0.141 and 0.135, respectively.
B) The process average is out of statistical control.
C) The process is not capable.
D) The process is capable.

Question

Quizplus · Accepted Answer

The process is capable because the process spread (6 * 0.003 = 0.018 cm) is less than the specification spread (0.150 - 0.120 = 0.030 cm).

The Upper and Lower Specification Limits for a Component Are