Question

15. A bottle‐filling operation has a target value of 20 and consistently averages 19.8 with a standard deviation of 0.5. The design engineers have established an upper specification limit of 22 and a lower specification limit of 18. Which statement concerning this process is TRUE? A. The two‐sided specification process capability index is 1.47 B. The one‐sided specification process capability index is 1.33 C. The process must be in control D. None of these is true

Answer 1

Answer:

A. The two sided specification process capability index is 1.47

Explanation:

The formula for calculating process capability index is :

( Upper specification Limit  - Average of mean ) / 3 * Standard Deviation

CI = ( 22 - 19.8 ) / 3 * 0.5

CI = 1.47 approximately.