Lean Six Sigma Yellow Belt Certification Prep 2 — Questions and Answers
Question 1: In DMAIC, what is the primary deliverable of the Measure phase?
- A validated measurement system and baseline process capability (Correct answer)
- A list of potential root causes
- An improved process map
- A control chart showing future performance
Correct answer: A validated measurement system and baseline process capability
The Measure phase establishes a reliable data collection system and quantifies the current baseline performance (Cp, Cpk, sigma level).
Question 2: A Yellow Belt team notices their process has a sigma level of 2.0. Approximately what percentage of outputs are defective?
- 4.5% (Correct answer)
- 0.27%
- 6.7%
- 30.9%
Correct answer: 4.5%
A 2-sigma process yields roughly 4.5% defects (308,537 DPMO), as each sigma level corresponds to a specific defect rate.
Question 3: Which tool is best used to display the relative frequency of defect categories in descending order?
- Pareto chart (Correct answer)
- Scatter diagram
- Control chart
- Histogram
Correct answer: Pareto chart
A Pareto chart ranks defect categories from most to least frequent, helping teams apply the 80/20 rule to focus improvement efforts.
Question 4: What does 'COPQ' stand for in Lean Six Sigma?
- Cost of Poor Quality (Correct answer)
- Control of Process Quality
- Calculation of Process Quantity
- Cost of Process Qualification
Correct answer: Cost of Poor Quality
COPQ (Cost of Poor Quality) includes all costs from defects: internal failures, external failures, appraisal, and prevention costs.
Question 5: A 'kaizen event' in Lean Six Sigma terminology refers to:
- A focused, short-duration improvement workshop targeting a specific process (Correct answer)
- A long-term strategic planning session
- A daily team stand-up meeting
- A customer satisfaction survey
Correct answer: A focused, short-duration improvement workshop targeting a specific process
A kaizen event is an intensive team-based improvement workshop, typically lasting 3–5 days, focused on rapidly improving a targeted process.
Question 6: In a SIPOC diagram, what does the 'S' represent?
- Suppliers (Correct answer)
- Standards
- Steps
- Stakeholders
Correct answer: Suppliers
SIPOC stands for Suppliers, Inputs, Process, Outputs, and Customers — 'S' represents the Suppliers who provide inputs to the process.
Question 7: Which Six Sigma role is typically responsible for mentoring Black Belts and leading large-scale transformation initiatives?
- Master Black Belt (Correct answer)
- Green Belt
- Yellow Belt
- Process Owner
Correct answer: Master Black Belt
Master Black Belts are the highest technical experts in Six Sigma, responsible for training, coaching Black Belts and driving enterprise-level strategy.
Lean Six Sigma Yellow Belt Certification Prep 2
In DMAIC, what is the primary deliverable of the Measure phase?