1
CSSGB ASQ CERTIFIED SIX SIGMA GREEN
BELT CERTIFICATION EXAM PREP GUIDE:
STUDY GUIDE | LATEST UPDATE 2026/2027 |
PRACTICE QUESTIONS AND ANSWERS | 100%
CORRECT ANSWERS | VERIFIED SOLUTIONS
This practice examination is designed for candidates preparing for the ASQ
Certified Six Sigma Green Belt (CSSGB) certification. It provides a rigorous
review of DMAIC, lean principles, statistical analysis, measurement systems,
process capability, hypothesis testing, design of experiments, quality tools, team
leadership, and project management. The questions reflect the latest 2026/2027
body of knowledge and emphasize both theoretical understanding and practical
application in manufacturing, service, healthcare, and transactional environments.
Each item includes verified solutions and concise explanations to help candidates
identify knowledge gaps and strengthen exam readiness. This guide is intended to
simulate advanced certification-level difficulty and support a focused, professional
study plan.
Table of Contents
I. Define Phase and Project Chartering
II. Measure Phase and Data Collection
III. Analyze Phase and Statistical Methods
IV. Improve Phase and Design of Experiments
V. Control Phase and SPC
VI. Lean Principles and Waste Reduction
VII. Quality Tools and Root Cause Analysis
VIII. Team Dynamics and Project Management
IX. Design for Six Sigma and Reliability
X. Professional Ethics and Program Management
, 2
Question 1: Which DMAIC phase is primarily responsible for developing the
project charter, identifying the voice of the customer, and defining critical-to-
quality characteristics?
A) Measure
B) Define
C) Analyze
D) Control
Correct Answer: B
The Define phase establishes the project’s purpose, scope, customers, and critical
requirements. The project charter, VOC translation, and CTQ identification are
core Define deliverables. Measure focuses on data collection, Analyze on causes,
and Control on sustaining gains.
Question 2: A Six Sigma team has collected raw customer statements such as “I
want my order faster” and “I need clear billing.” Which tool best translates these
statements into measurable requirements?
A) Pareto chart
B) Control chart
C) CTQ tree
D) Scatter diagram
Correct Answer: C
A CTQ tree translates broad customer needs into specific, measurable critical-to-
quality requirements. Pareto charts prioritize problems, control charts monitor
stability, and scatter diagrams examine relationships. The CTQ tree is the direct
VOC-to-measurement tool.
Question 3: In a SIPOC diagram, what does the “P” represent?
A) Process
B) Product
C) Performance
D) Prevention
Correct Answer: A
SIPOC stands for Suppliers, Inputs, Process, Outputs, and Customers. The “P” is
the process, shown at a high level to establish scope. Product, performance, and
prevention are not part of the SIPOC acronym.
, 3
Question 4: A team creates a bar chart showing defect categories ordered from
highest frequency to lowest. This tool is most likely a:
A) Histogram
B) Run chart
C) Fishbone diagram
D) Pareto chart
Correct Answer: D
A Pareto chart orders categories by frequency or impact, helping teams focus on
the “vital few.” A histogram shows distribution, a run chart shows time trends,
and a fishbone diagram organizes potential causes. The ordered bar chart is a
Pareto chart.
Question 5: A process FMEA identifies a failure mode with severity 8, occurrence
4, and detection 3. What is the risk priority number?
A) 15
B) 24
C) 96
D) 128
Correct Answer: C
RPN is calculated as Severity × Occurrence × Detection. Multiplying 8 × 4 × 3
gives 96. The other options result from incorrect arithmetic or misunderstanding
the RPN formula.
Question 6: Which cost is classified as an external failure cost in a cost-of-quality
model?
A) Warranty claims and product recalls
B) Incoming inspection
C) Operator training
D) Preventive maintenance
Correct Answer: A
External failure costs occur after the customer receives a nonconforming product,
such as warranty claims, returns, and recalls. Incoming inspection is appraisal
cost, while training and preventive maintenance are prevention costs.
Question 7: A process produces 20 defects across 500 units, with 10 defect
opportunities per unit. What is the DPMO?
A) 400
CSSGB ASQ CERTIFIED SIX SIGMA GREEN
BELT CERTIFICATION EXAM PREP GUIDE:
STUDY GUIDE | LATEST UPDATE 2026/2027 |
PRACTICE QUESTIONS AND ANSWERS | 100%
CORRECT ANSWERS | VERIFIED SOLUTIONS
This practice examination is designed for candidates preparing for the ASQ
Certified Six Sigma Green Belt (CSSGB) certification. It provides a rigorous
review of DMAIC, lean principles, statistical analysis, measurement systems,
process capability, hypothesis testing, design of experiments, quality tools, team
leadership, and project management. The questions reflect the latest 2026/2027
body of knowledge and emphasize both theoretical understanding and practical
application in manufacturing, service, healthcare, and transactional environments.
Each item includes verified solutions and concise explanations to help candidates
identify knowledge gaps and strengthen exam readiness. This guide is intended to
simulate advanced certification-level difficulty and support a focused, professional
study plan.
Table of Contents
I. Define Phase and Project Chartering
II. Measure Phase and Data Collection
III. Analyze Phase and Statistical Methods
IV. Improve Phase and Design of Experiments
V. Control Phase and SPC
VI. Lean Principles and Waste Reduction
VII. Quality Tools and Root Cause Analysis
VIII. Team Dynamics and Project Management
IX. Design for Six Sigma and Reliability
X. Professional Ethics and Program Management
, 2
Question 1: Which DMAIC phase is primarily responsible for developing the
project charter, identifying the voice of the customer, and defining critical-to-
quality characteristics?
A) Measure
B) Define
C) Analyze
D) Control
Correct Answer: B
The Define phase establishes the project’s purpose, scope, customers, and critical
requirements. The project charter, VOC translation, and CTQ identification are
core Define deliverables. Measure focuses on data collection, Analyze on causes,
and Control on sustaining gains.
Question 2: A Six Sigma team has collected raw customer statements such as “I
want my order faster” and “I need clear billing.” Which tool best translates these
statements into measurable requirements?
A) Pareto chart
B) Control chart
C) CTQ tree
D) Scatter diagram
Correct Answer: C
A CTQ tree translates broad customer needs into specific, measurable critical-to-
quality requirements. Pareto charts prioritize problems, control charts monitor
stability, and scatter diagrams examine relationships. The CTQ tree is the direct
VOC-to-measurement tool.
Question 3: In a SIPOC diagram, what does the “P” represent?
A) Process
B) Product
C) Performance
D) Prevention
Correct Answer: A
SIPOC stands for Suppliers, Inputs, Process, Outputs, and Customers. The “P” is
the process, shown at a high level to establish scope. Product, performance, and
prevention are not part of the SIPOC acronym.
, 3
Question 4: A team creates a bar chart showing defect categories ordered from
highest frequency to lowest. This tool is most likely a:
A) Histogram
B) Run chart
C) Fishbone diagram
D) Pareto chart
Correct Answer: D
A Pareto chart orders categories by frequency or impact, helping teams focus on
the “vital few.” A histogram shows distribution, a run chart shows time trends,
and a fishbone diagram organizes potential causes. The ordered bar chart is a
Pareto chart.
Question 5: A process FMEA identifies a failure mode with severity 8, occurrence
4, and detection 3. What is the risk priority number?
A) 15
B) 24
C) 96
D) 128
Correct Answer: C
RPN is calculated as Severity × Occurrence × Detection. Multiplying 8 × 4 × 3
gives 96. The other options result from incorrect arithmetic or misunderstanding
the RPN formula.
Question 6: Which cost is classified as an external failure cost in a cost-of-quality
model?
A) Warranty claims and product recalls
B) Incoming inspection
C) Operator training
D) Preventive maintenance
Correct Answer: A
External failure costs occur after the customer receives a nonconforming product,
such as warranty claims, returns, and recalls. Incoming inspection is appraisal
cost, while training and preventive maintenance are prevention costs.
Question 7: A process produces 20 defects across 500 units, with 10 defect
opportunities per unit. What is the DPMO?
A) 400
