IASSC Certified Lean Six Sigma Green Belt (ICGB) — Question 18

Significant variation in process performance is a consequence of several causes that can be classified using which of the terminologies shown. (Note: There are 2 correct answers).

Answer options

• A. Common
• B. Random
• C. Uneducated
• D. Special
• E. Vital

Correct answer: A, D

Explanation

The correct answers are A (Common) and D (Special) as they represent the two types of variation in process performance: common cause and special cause variations. Options B (Random), C (Uneducated), and E (Vital) do not accurately classify the sources of process variation.