Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Six Sigma Fundamentals Questions and Answers 2 — Questions and Answers
Question 1: What does the acronym DMAIC stand for in Six Sigma?
- Define, Measure, Analyze, Improve, Control (Correct answer)
- Design, Manage, Assess, Implement, Check
- Develop, Monitor, Adjust, Integrate, Close
- Define, Map, Audit, Inspect, Confirm
Correct answer: Define, Measure, Analyze, Improve, Control
DMAIC stands for Define, Measure, Analyze, Improve, and Control, which is the core problem-solving methodology in Six Sigma.
Question 2: Which metric represents the number of defects per million opportunities in Six Sigma?
- DPMO (Correct answer)
- DPU
- CTQ
- VOC
Correct answer: DPMO
DPMO (Defects Per Million Opportunities) is the standard Six Sigma metric that quantifies process performance on a per-million scale.
Question 3: A process operating at a Six Sigma level produces no more than how many defects per million opportunities?
- 3.4 (Correct answer)
- 6.0
- 1.0
- 10.0
Correct answer: 3.4
A true Six Sigma process allows no more than 3.4 defects per million opportunities, accounting for a 1.5 sigma shift.
Question 4: Which of the following best describes a Critical to Quality (CTQ) characteristic?
- A measurable attribute of a product that is most important to the customer (Correct answer)
- A financial metric used to justify Six Sigma projects
- The total number of defects found during inspection
- A tool for mapping the steps in a manufacturing process
Correct answer: A measurable attribute of a product that is most important to the customer
CTQ characteristics are the specific, measurable attributes of a product or process that customers identify as most important to quality.
Question 5: What is the primary purpose of the Define phase in DMAIC?
- To clearly state the problem, goals, and project scope (Correct answer)
- To collect data on current process performance
- To identify the root causes of defects
- To implement solutions and verify results
Correct answer: To clearly state the problem, goals, and project scope
The Define phase establishes the problem statement, project goals, scope, and timeline before any data collection begins.
Question 6: Which term describes variation in a process caused by identifiable, irregular factors?
- Special cause variation (Correct answer)
- Common cause variation
- Random variation
- Systematic sampling
Correct answer: Special cause variation
Special cause variation results from specific, assignable factors that are not part of the normal process operation and can be identified and removed.
