Six Sigma & Lean Fundamentals
41 practice questions with explanations — 15 free to try
PassNova has 41 Lean Six Sigma Yellow Belt practice questions on Six Sigma & Lean Fundamentals, each with a clear explanation. A 15-question taster is free with no sign-up; the full bank is part of PassNova Premium. Updated for 2026.
Six Sigma & Lean Fundamentals: example questions & answers
3 worked examples with answers and explanations below. Try 15 Lean Six Sigma Yellow Belt questions free in the browser; the full 41-question Six Sigma & Lean Fundamentals bank is part of PassNova Premium.
The primary goal of Lean is best described as:
- AReducing process variation until output reaches 3.4 defects per million opportunities
- BIncreasing the number of inspection points
- CMaximising machine utilisation regardless of demand
- DEliminating waste and improving flow to deliver value to the customer✓
Answer: Lean focuses on eliminating waste (non-value-adding activity) and improving flow so that value moves smoothly to the customer.
In a 'Six Sigma' process, how many defects per million opportunities (DPMO) are expected?
- A3.4 defects✓
- B66,807 defects
- C6 defects
- D233 defects
Answer: A process operating at Six Sigma quality (with the standard 1.5 sigma shift) produces about 3.4 defects per million opportunities.
In Lean thinking, an activity that the customer is willing to pay for and that changes the product or service is called:
- AValue-adding✓
- BBusiness-non-value-adding
- CNecessary waste
- DNon-value-adding
Answer: A value-adding activity transforms the product or service in a way the customer is willing to pay for.