Lean Six Sigma Green Belt Certification FREE LSSGB Questions and Answers 3 — Questions and Answers
Question 1: What does the 'Control' phase of DMAIC primarily aim to achieve?
- Identify customer requirements
- Establish baseline measurements
- Sustain improvements over time (Correct answer)
- Generate potential solutions
Correct answer: Sustain improvements over time
The Control phase implements monitoring systems and control plans to ensure that process improvements are maintained long-term.
Question 2: Which Lean tool uses a visual board to limit work-in-progress and improve flow?
- Value Stream Map
- Kanban (Correct answer)
- 5S
- Poka-Yoke
Correct answer: Kanban
Kanban uses visual boards with WIP limits to manage workflow, reduce bottlenecks, and improve throughput.
Question 3: In a control chart, what do points outside the upper and lower control limits indicate?
- Normal process variation
- Common cause variation
- Special cause variation (Correct answer)
- Measurement error
Correct answer: Special cause variation
Points beyond control limits signal special cause variation, indicating an assignable factor is affecting the process beyond normal randomness.
Question 4: What is the formula for calculating Defects Per Million Opportunities (DPMO)?
- (Defects / Units) x 1,000,000
- (Defects / Opportunities) x 1,000,000
- (Defects / (Units x Opportunities)) x 1,000,000 (Correct answer)
- (Units / Defects) x 1,000,000
Correct answer: (Defects / (Units x Opportunities)) x 1,000,000
DPMO is calculated by dividing the number of defects by the total opportunities (units multiplied by opportunities per unit) and multiplying by one million.
Question 5: Which of the following best describes 'muda' in Lean methodology?
- Overburden on workers or equipment
- Unevenness in production scheduling
- Any activity that consumes resources without creating value (Correct answer)
- A continuous improvement event
Correct answer: Any activity that consumes resources without creating value
Muda refers to waste — any activity or process step that uses resources but does not add value from the customer's perspective.
Question 6: What is the primary benefit of using a Measurement System Analysis (MSA)?
- To reduce production cycle time
- To ensure the measurement system is accurate and reliable (Correct answer)
- To identify customer requirements
- To calculate process sigma level
Correct answer: To ensure the measurement system is accurate and reliable
MSA evaluates the accuracy, precision, and stability of a measurement system to ensure collected data is trustworthy for decision-making.
Lean Six Sigma Green Belt Certification FREE LSSGB Questions and Answers 3
What does the 'Control' phase of DMAIC primarily aim to achieve?