Which of the following measures the proportion of variation (3sigma ) between the center of the process and the nearest specification limit?

A. process range

B. process capability index

C. process capability ratio

D. standard deviation of the process population

option B

Explanation:

The correct answer is option B

the measure of variation between the center of the process and the nearest specification limit is the process capability index.

The process capability index is the capability of producers to produce the product in the tolerance range.

Cpk is used to estimate how close you are to the target and how consistent you are around your average performance.

Cpk can also be used to estimate the future estimation of the process performance.