IASSC Certified Lean Six Sigma Black Belt (ICBB) — Question 16

The reported Cpk for a process with an average of 104 units, a spread of 18 units and upper and lower specification limits of 122 and 96 units would be?

Answer options

• A. 0.5
• B. 0.89
• C. 1.00
• D. 2.00

Correct answer: B

Explanation

The Cpk is calculated by determining the distance of the process mean from the nearest specification limit and dividing it by three times the standard deviation. In this case, the calculations yield a Cpk of 0.89, making option B the correct answer. The other options do not accurately reflect the calculated Cpk value based on the given parameters.