For a given item the upper specific ation imit is 75 and the

For a given item the upper specific ation imit is 75 and the lower specification limit is 35.it can be assumed that 1) the process mean is centered in the specification intervalt, and 2) the process standard deviation s 4 5. What is this process\' capability ratio? Moving to anorer question witsave this response Question 1 of 4

Solution

It is given that

USL = 75

LSL = 35

Std deviation, s = 4.5

Process capability ratio, Cp = (USL - LSL) /6s

= (75 - 35)/(6*4.5)

= 1.48 -> ANSWER

Mean is centred between USL and LSL, therefore Cpk is also equal to Cp