Page 1 of 70
AIGPE CERTIFIED SIX SIGMA GREEN BELT
EXAMINATION STUDY GUIDE | LATEST
UPDATE 2026/2027 | PRACTICE QUESTIONS
AND ANSWERS | EXAM REVIEW.
TABLE OF CONTENTS
1. Six Sigma Fundamentals
2. Define Phase
3. Measure Phase
4. Analyze Phase
5. Improve Phase
6. Control Phase
7. Lean Principles and Tools
8. Statistical Concepts
9. Project Management and Team Dynamics
10. Exam Preparation Strategies
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Question 1: What is the primary definition of Six Sigma?
A) A metric only
B) A philosophy only
C) A data-driven methodology aimed at reducing defects to 3.4 per million opportunities
D) A financial auditing system
Correct Answer: C) A data-driven methodology aimed at reducing defects to 3.4 per
million opportunities
Six Sigma is best defined as a data-driven methodology aimed at reducing defects to 3.4 per
million opportunities. It is both a metric and a philosophy, but the most complete definition
encompasses the methodology's purpose of near-perfect quality through systematic process
improvement.
Question 2: What does DPMO stand for?
A) Defects Per Million Opportunities
B) Defects Per Manufacturing Operation
C) Data Processing Management Overview
D) Defect Prevention Method Output
Correct Answer: A) Defects Per Million Opportunities
DPMO stands for Defects Per Million Opportunities. It is a key Six Sigma metric that
quantifies the number of defects in a process per one million opportunities for a defect to
occur, allowing comparison of processes with different complexity levels.
Question 3: What does DMAIC stand for?
A) Define, Measure, Analyze, Improve, Control
B) Design, Manage, Assess, Implement, Check
C) Data, Metrics, Analysis, Inspection, Certification
D) Develop, Monitor, Adjust, Integrate, Confirm
Correct Answer: A) Define, Measure, Analyze, Improve, Control
DMAIC is the core improvement framework of Six Sigma. It consists of five phases: Define
(problem identification), Measure (data collection and baseline), Analyze (root cause
identification), Improve (solution implementation), and Control (sustaining gains).
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Question 4: What is the primary purpose of the Define phase?
A) To collect baseline data
B) To identify the problem, define project scope, and understand customer requirements
C) To implement solutions
D) To monitor process performance
Correct Answer: B) To identify the problem, define project scope, and understand
customer requirements
The Define phase focuses on project identification, voice of customer, project selection,
stakeholder analysis, and establishing the project charter. It sets the foundation for the entire
DMAIC project by clearly articulating the problem and scope.
Question 5: What is the purpose of a project charter?
A) To collect data
B) To formally authorize the project and define its scope, goals, and team
C) To analyze root causes
D) To monitor process performance
Correct Answer: B) To formally authorize the project and define its scope, goals, and
team
The project charter is a document that formally authorizes the Six Sigma project. It includes
the business case, problem statement, goal statement, scope statement, project team, and
milestones. It serves as the foundation and reference point for the project.
Question 6: What is the Voice of the Customer (VOC)?
A) The customer's opinion about pricing
B) A method for capturing customer needs and expectations
C) The customer's complaints only
D) The company's marketing strategy
Correct Answer: B) A method for capturing customer needs and expectations
Voice of the Customer (VOC) is a systematic method for capturing customer needs,
expectations, and requirements. It translates qualitative customer feedback into measurable
Critical-to-Quality (CTQ) requirements.
, Page 4 of 70
Question 7: What are the three steps of the VOC process?
A) Survey, analyze, report
B) Take the exact voice of customer, excerpts from customers showcasing need, write
customer need in measurable terms (CTQ)
C) Design, test, implement
D) Plan, do, check
Correct Answer: B) Take the exact voice of customer, excerpts from customers
showcasing need, write customer need in measurable terms (CTQ)
The VOC process involves: 1) Taking the exact voice of the customer, 2) Extracting excerpts
from customers showcasing the need, and 3) Translating the need into Critical-to-Quality
(CTQ) requirements written in measurable terms.
Question 8: What is a Critical-to-Quality (CTQ) tree?
A) A tool to map process steps
B) A tool that translates customer needs into measurable performance requirements
C) A tool to identify root causes
D) A tool to monitor process stability
Correct Answer: B) A tool that translates customer needs into measurable performance
requirements
A CTQ tree drills down from broad customer needs (VOC) to specific, measurable Critical-
to-Quality requirements. It helps ensure that improvement efforts are focused on what matters
most to the customer.
Question 9: In the Kano Model, what is a "Basic" (Must-Be) attribute?
A) An attribute that customers expect and take for granted; its absence causes dissatisfaction
B) An attribute that delights customers when present
C) An attribute that has a linear relationship with satisfaction
D) An attribute that customers are indifferent to
Correct Answer: A) An attribute that customers expect and take for granted; its absence
causes dissatisfaction
AIGPE CERTIFIED SIX SIGMA GREEN BELT
EXAMINATION STUDY GUIDE | LATEST
UPDATE 2026/2027 | PRACTICE QUESTIONS
AND ANSWERS | EXAM REVIEW.
TABLE OF CONTENTS
1. Six Sigma Fundamentals
2. Define Phase
3. Measure Phase
4. Analyze Phase
5. Improve Phase
6. Control Phase
7. Lean Principles and Tools
8. Statistical Concepts
9. Project Management and Team Dynamics
10. Exam Preparation Strategies
, Page 2 of 70
Question 1: What is the primary definition of Six Sigma?
A) A metric only
B) A philosophy only
C) A data-driven methodology aimed at reducing defects to 3.4 per million opportunities
D) A financial auditing system
Correct Answer: C) A data-driven methodology aimed at reducing defects to 3.4 per
million opportunities
Six Sigma is best defined as a data-driven methodology aimed at reducing defects to 3.4 per
million opportunities. It is both a metric and a philosophy, but the most complete definition
encompasses the methodology's purpose of near-perfect quality through systematic process
improvement.
Question 2: What does DPMO stand for?
A) Defects Per Million Opportunities
B) Defects Per Manufacturing Operation
C) Data Processing Management Overview
D) Defect Prevention Method Output
Correct Answer: A) Defects Per Million Opportunities
DPMO stands for Defects Per Million Opportunities. It is a key Six Sigma metric that
quantifies the number of defects in a process per one million opportunities for a defect to
occur, allowing comparison of processes with different complexity levels.
Question 3: What does DMAIC stand for?
A) Define, Measure, Analyze, Improve, Control
B) Design, Manage, Assess, Implement, Check
C) Data, Metrics, Analysis, Inspection, Certification
D) Develop, Monitor, Adjust, Integrate, Confirm
Correct Answer: A) Define, Measure, Analyze, Improve, Control
DMAIC is the core improvement framework of Six Sigma. It consists of five phases: Define
(problem identification), Measure (data collection and baseline), Analyze (root cause
identification), Improve (solution implementation), and Control (sustaining gains).
, Page 3 of 70
Question 4: What is the primary purpose of the Define phase?
A) To collect baseline data
B) To identify the problem, define project scope, and understand customer requirements
C) To implement solutions
D) To monitor process performance
Correct Answer: B) To identify the problem, define project scope, and understand
customer requirements
The Define phase focuses on project identification, voice of customer, project selection,
stakeholder analysis, and establishing the project charter. It sets the foundation for the entire
DMAIC project by clearly articulating the problem and scope.
Question 5: What is the purpose of a project charter?
A) To collect data
B) To formally authorize the project and define its scope, goals, and team
C) To analyze root causes
D) To monitor process performance
Correct Answer: B) To formally authorize the project and define its scope, goals, and
team
The project charter is a document that formally authorizes the Six Sigma project. It includes
the business case, problem statement, goal statement, scope statement, project team, and
milestones. It serves as the foundation and reference point for the project.
Question 6: What is the Voice of the Customer (VOC)?
A) The customer's opinion about pricing
B) A method for capturing customer needs and expectations
C) The customer's complaints only
D) The company's marketing strategy
Correct Answer: B) A method for capturing customer needs and expectations
Voice of the Customer (VOC) is a systematic method for capturing customer needs,
expectations, and requirements. It translates qualitative customer feedback into measurable
Critical-to-Quality (CTQ) requirements.
, Page 4 of 70
Question 7: What are the three steps of the VOC process?
A) Survey, analyze, report
B) Take the exact voice of customer, excerpts from customers showcasing need, write
customer need in measurable terms (CTQ)
C) Design, test, implement
D) Plan, do, check
Correct Answer: B) Take the exact voice of customer, excerpts from customers
showcasing need, write customer need in measurable terms (CTQ)
The VOC process involves: 1) Taking the exact voice of the customer, 2) Extracting excerpts
from customers showcasing the need, and 3) Translating the need into Critical-to-Quality
(CTQ) requirements written in measurable terms.
Question 8: What is a Critical-to-Quality (CTQ) tree?
A) A tool to map process steps
B) A tool that translates customer needs into measurable performance requirements
C) A tool to identify root causes
D) A tool to monitor process stability
Correct Answer: B) A tool that translates customer needs into measurable performance
requirements
A CTQ tree drills down from broad customer needs (VOC) to specific, measurable Critical-
to-Quality requirements. It helps ensure that improvement efforts are focused on what matters
most to the customer.
Question 9: In the Kano Model, what is a "Basic" (Must-Be) attribute?
A) An attribute that customers expect and take for granted; its absence causes dissatisfaction
B) An attribute that delights customers when present
C) An attribute that has a linear relationship with satisfaction
D) An attribute that customers are indifferent to
Correct Answer: A) An attribute that customers expect and take for granted; its absence
causes dissatisfaction
