Lean Six Sigma Black Belt (LSSBB) — Question 6

What is the Ppk of a process with a spread of 24 units, an average of 68, an upper limit of 82 and a lower limit of 54?

Answer options

• A. 1.68
• B. 2.00
• C. 4.00
• D. 4.42

Correct answer: C

Explanation

The Ppk is calculated based on the process average, the specification limits, and the standard deviation. In this case, the spread and limits result in a Ppk of 4.00, which indicates a capable process. The other options do not reflect the correct calculation based on the provided parameters.