LEAN SIX SIGMA GREEN BELT
CERTIFICATION EXAMINATION
QUESTION AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A INSTANT DOWNLOAD PDF
1. Which phase of DMAIC focuses on defining the problem and project goals?
A. Measure
B. Analyze
C. Define
D. Improve
Rationale: The Define phase establishes the problem statement, scope,
goals, and customer requirements.
2. What is the primary purpose of a SIPOC diagram?
A. Identify defects
B. Provide a high-level view of a process
C. Calculate sigma level
D. Perform root cause analysis
Rationale: SIPOC summarizes Suppliers, Inputs, Process, Outputs, and
Customers at a high level.
3. Which tool is best used to capture the Voice of the Customer (VOC)?
A. Control chart
B. Customer surveys
C. Histogram
D. Scatter diagram
, Rationale: Surveys are commonly used to directly collect customer needs
and expectations.
4. CTQ stands for:
A. Critical Time Quality
B. Control Through Quality
C. Critical to Quality
D. Cost to Quality
Rationale: CTQs are measurable characteristics that are critical to
customer satisfaction.
5. What is the main output of the Define phase?
A. Root cause
B. Project charter
C. Control plan
D. FMEA
Rationale: The project charter formally defines the problem, goals, scope,
and team.
6. In Lean, what does “waste” refer to?
A. Scrap only
B. Nonstandard work
C. Any activity that does not add value
D. Excess inventory only
Rationale: Waste includes all non–value-added activities from the
customer’s perspective.
7. Which of the following is NOT one of the 8 wastes (DOWNTIME)?
A. Defects
B. Overproduction
C. Inspection
D. Motion
Rationale: Inspection is a business activity but not classified as one of the
8 Lean wastes.
, 8. The Measure phase primarily focuses on:
A. Generating solutions
B. Establishing baseline performance
C. Sustaining improvements
D. Identifying stakeholders
Rationale: Measure quantifies current performance and validates
measurement systems.
9. What does a process map help identify?
A. Project costs
B. Process steps and flow
C. Customer satisfaction
D. Control limits
Rationale: Process maps visually represent the sequence of steps in a
process.
10.Which metric measures process variation relative to specification limits?
A. Mean
B. Cp
C. Range
D. Defect count
Rationale: Cp compares process spread to specification width.
11.What is the primary goal of Measurement System Analysis (MSA)?
A. Improve cycle time
B. Assess measurement accuracy and precision
C. Reduce defects
D. Identify root causes
Rationale: MSA evaluates whether data collection is reliable.
12.Which tool is used to visualize data distribution?
A. Pareto chart
B. Histogram
C. Fishbone diagram
CERTIFICATION EXAMINATION
QUESTION AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A INSTANT DOWNLOAD PDF
1. Which phase of DMAIC focuses on defining the problem and project goals?
A. Measure
B. Analyze
C. Define
D. Improve
Rationale: The Define phase establishes the problem statement, scope,
goals, and customer requirements.
2. What is the primary purpose of a SIPOC diagram?
A. Identify defects
B. Provide a high-level view of a process
C. Calculate sigma level
D. Perform root cause analysis
Rationale: SIPOC summarizes Suppliers, Inputs, Process, Outputs, and
Customers at a high level.
3. Which tool is best used to capture the Voice of the Customer (VOC)?
A. Control chart
B. Customer surveys
C. Histogram
D. Scatter diagram
, Rationale: Surveys are commonly used to directly collect customer needs
and expectations.
4. CTQ stands for:
A. Critical Time Quality
B. Control Through Quality
C. Critical to Quality
D. Cost to Quality
Rationale: CTQs are measurable characteristics that are critical to
customer satisfaction.
5. What is the main output of the Define phase?
A. Root cause
B. Project charter
C. Control plan
D. FMEA
Rationale: The project charter formally defines the problem, goals, scope,
and team.
6. In Lean, what does “waste” refer to?
A. Scrap only
B. Nonstandard work
C. Any activity that does not add value
D. Excess inventory only
Rationale: Waste includes all non–value-added activities from the
customer’s perspective.
7. Which of the following is NOT one of the 8 wastes (DOWNTIME)?
A. Defects
B. Overproduction
C. Inspection
D. Motion
Rationale: Inspection is a business activity but not classified as one of the
8 Lean wastes.
, 8. The Measure phase primarily focuses on:
A. Generating solutions
B. Establishing baseline performance
C. Sustaining improvements
D. Identifying stakeholders
Rationale: Measure quantifies current performance and validates
measurement systems.
9. What does a process map help identify?
A. Project costs
B. Process steps and flow
C. Customer satisfaction
D. Control limits
Rationale: Process maps visually represent the sequence of steps in a
process.
10.Which metric measures process variation relative to specification limits?
A. Mean
B. Cp
C. Range
D. Defect count
Rationale: Cp compares process spread to specification width.
11.What is the primary goal of Measurement System Analysis (MSA)?
A. Improve cycle time
B. Assess measurement accuracy and precision
C. Reduce defects
D. Identify root causes
Rationale: MSA evaluates whether data collection is reliable.
12.Which tool is used to visualize data distribution?
A. Pareto chart
B. Histogram
C. Fishbone diagram
