Certified Six Sigma
Green Belt Exam (CSSGB)
The Certified Six Sigma Green Belt (CSSGB) exam is a professional certification assessment that validates a candidate’s knowledge of Lean Six Sigma fundamentals, DMAIC methodology, and Green Belt–level analytical tools.
The Certified Six Sigma Green Belt (CSSGB) exam is designed for professionals who already understand Lean Six Sigma concepts and want to validate their skills formally.
Whether you gained your knowledge through prior training, on-the-job experience, or self-study, this exam provides a credible, third-party assessment of Green Belt–level competency.
Who is This Exam For?
The CSSGB exam is intended for professionals who are actively applying Lean Six Sigma methods and want a recognized credential to demonstrate their capability. This exam is ideal for:
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Professionals who lead or support improvement projects within their department or function
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Analysts, engineers, supervisors, and project contributors using data to solve problems
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Quality, operations, supply chain, healthcare, or service professionals applying DMAIC tools
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Candidates who completed Green Belt training elsewhere and need independent certification
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Individuals seeking career advancement through a respected Lean Six Sigma credential
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Professionals preparing for future Black Belt certification
If you understand DMAIC, basic statistical tools, root cause analysis, and process improvement methods, this exam allows you to validate your Green Belt–level knowledge formally.
Exam Structure & Format
Objective: Demonstrate your knowledge and proficiency at the Green Belt certification level.
- Questions: 100
- Duration: 2 hours
- Question Format: Multiple Choice
- Delivery: Asynchronous
- Passing Score: 80%
- Attempts: 2
Certification & Verification
Upon passing the CSSGB exam, you will receive:
Custom Digital Certificate
Certification Directory Listing
- Unique Certification Serial Number
The CSSGB verifiable credential from an accredited certification provider
Your certification can be independently verified, ensuring credibility and long-term value.
There are no formal prerequisites to sit for the CSSGB exam
There are no formal prerequisites to sit for the CSSGB exam. However, candidates are encouraged to have prior exposure to Lean Six Sigma Green Belt improvement projects and standard Green Belt tools & methods.
If you are unsure whether you’re ready, Lean Sigma Corporation also offers a CSSGB Certification Course designed to fully prepare candidates for this exam.
What the CSSGB Exam Validates
The CSSGB exam assesses your ability to understand and apply Lean Six Sigma concepts at the Green Belt level, including:
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Understanding of Lean principles and Six Sigma fundamentals
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Knowledge of the DMAIC methodology and how each phase is applied
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Ability to interpret data, charts, and basic statistical outputs
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Use of common tools such as Pareto charts, process maps, and control charts
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Practical problem-solving skills for real business environments
This is not a memorization-only exam. The CSSGB evaluates conceptual understanding, application, and readiness to contribute meaningfully to improvement efforts.
Enrollment Includes
CSSGB exam enrollment includes two exam attempts along with the following learning aids to help with your preparation. Much of this content also serves as a professional productivity enhancer during your career ascension.
Exam Body of Knowledge
Certified Six Sigma Green Belt Exam (CSSGB)
Certification Requirements
- Pass the CSSGB Exam (80%, 2 Hours, 2 Attempts)
- Provide Your Professional Certification Review
This Exam Does NOT Require a Project | Statistical Software is NOT Required
Course versions refer to Minitab, SigmaXL, and JMP, which are not relevant for Exam-only enrollees | DESIGNATION KEY: CSS = Certified Six Sigma | BB = Black Belt | GB = Green Belt | YB = Yellow Belt | PDU = Professional Development Units | CEU = Continuing Education Units | CPD = Continuing Professional Development
*Pass Rate: (#Passes/#Exams) for the Period 1/1/25 - 12/31/25; Unique Students
CSSGB Curriculum Outline
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Define Phase
Overview of Six Sigma
Six Sigma Fundamentals
Lean Six Sigma Projects
Lean Fundamentals
Define Phase Test
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Measure Phase
Process Definition
Six Sigma Statistics
Measurement Systems
Process Capability
Measure Phase Test
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Analyze Phase
Inferential Statistics
Hypothesis Testing
Hyp. Tests Normal
Hyp. Tests Non-Normal
Analyze Phase Test
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Improve Phase
Simple Linear Regression
Multiple Regression
Improve Phase Test
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Control Phase
Statistical Process Control
Six Sigma Control Plans
Lean Controls
Control Phase Test
CSSGB Exam
CSSGB Curriculum Detail
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DEFINE PHASE
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Overview of Six Sigma
What is Six Sigma
Six Sigma History
Y=f(x) Approach
Six Sigma Methodology
Roles & Responsibilities -
Six Sigma Fundamentals
Defining a Process
VOC & CTQ's
QFD
Cost of Poor Quality
Pareto Analysis (80:20) -
Lean Six Sigma Projects
Six Sigma Metrics
Rolled Throughput Yield
Business Case & Charter
Project Team Selection
Project Risk Management
Project Planning -
Lean Fundamentals
Lean and Six Sigma
History of Lean
Seven Deadly Muda
Five-S (5S) -
Define Phase Test
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MEASURE PHASE
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Process Definition
Cause & Effect Diagram
Cause & Effect Matrix
Process Mapping
FMEA
Theory of Constraints -
Six Sigma Statistics
Basic Statistics
Descriptive Statistics
Distributions & Normality
Graphical Analysis -
MSA
Precision & Accuracy
Bias, Linearity & Stability
Gage R&R
Variable & Attribute MSA -
Process Capability
Capability Analysis
Concept of Stability
Attribute vs Discrete
Monitoring Techniques -
Measure Phase Test
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ANALYZE PHASE
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Inferential Statistics
Understanding Inference
Sampling Techniques
Sample Size
Central Limit Theorem -
Hypothesis Testing
Hypothesis Testing
Statistical Significance
Risk; Alpha & Beta
Types of Hypothesis Tests -
Hyp. Tests Normal
1-sample t-test
2-Sample t-test
Paired t-test
1-sample variance
One Way ANOVA -
Hyp. Tests Non-Normal
Mann-Whitney
Moods Median
Kruskal-Wallis / Friedman
1 Sample Sign & Wilcoxon
1 & 2 Sample Proportions
Chi-Squared
Test of Equal Variances -
Analyze Phase Test
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IMPROVE PHASE
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Simple Linear Reg.
Correlation
X-Y Diagram
Regression Equations
Residuals Analysis -
Multiple Regression
Non-Linear Reg.
Multiple Linear Reg.
Confidence Intervals
Residuals Analysis
Box-Cox Transformation
Stepwise Regression
Logistic Regression -
Improve Phase Test
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CONTROL PHASE
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SPC
Data Collection for SPC
Individuals Charts
Xbar Charts
Proportions Charts
CumSum, EWMA Charts
Control Chart Anatomy
Subgroups & Sampling
Control Limits -
Lean Controls
Control Methods for 5S
Kanban
Poka-Yoke -
Six Sigma Control Plans
Cost Benefit Analysis
Control Plan Elements
Response Plan Elements -
Control Phase Test
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CSSGB Exam
Certification Requirements
Frequently Asked Questions
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Certified Six Sigma Green Belt Exam (CSSGB)
Online Certification Exam
