Question

A manufacturing process produces a certain part with a mean diameter of 2 inches and a standard deviation of 0.03 inches. The engineer specification of the part is from 1.9 to 2.05. Is the process capable?

Answer 1

Not capable

Explanation:

Cp = (USL - LSL) / 6s

= (2.05-1.9) / (6 * 0.03)

= 0.833

So the process is not capable because the Cp is less than 1.