Certified Six Sigma
Yellow Belt Exam (CSSYB)
Validate your Lean Six Sigma knowledge with an independent,
globally recognized Yellow Belt certification exam.
The Certified Six Sigma Yellow Belt (CSSYB) exam is a professional certification assessment that validates a candidate’s foundational understanding of Lean Six Sigma principles, process improvement concepts, and the DMAIC framework.
The exam evaluates knowledge of basic quality tools, team-based improvement roles, and the ability to support data-driven initiatives within an organization.
The CSSYB exam is designed for professionals who participate in improvement projects, contribute to problem-solving teams, or seek a formal introduction to Six Sigma methodology.
Successful candidates demonstrate comprehension of core concepts rather than advanced statistical analysis, making the certification suitable for entry-level practitioners and cross-functional team members.
Who is This Exam For?
The Certified Six Sigma Yellow Belt (CSSYB) exam is designed for professionals who want a formal introduction to Lean Six Sigma and a recognized credential that validates foundational knowledge.
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Team members who participate in process improvement initiatives
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Professionals who support Six Sigma projects led by Green or Black Belts
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Individuals seeking an entry point into the Lean Six Sigma methodology
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Cross-functional contributors involved in continuous improvement
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Professionals exploring Six Sigma as a pathway to future career progression
The CSSYB exam focuses on understanding core concepts, terminology, and improvement roles rather than advanced statistics or complex analysis.
Exam Structure & Format
Objective: Demonstrate your knowledge and proficiency at the Yellow Belt certification level.
- Questions: 50
- Duration: 1 hour
- Question Format: Multiple Choice
- Delivery: Asynchronous
- Passing Score: 80%
- Attempts: 2
Certification & Verification
Upon passing the CSSYB exam, you will receive:
Custom Digital Certificate
Certification Directory Listing
- Unique Certification Serial Number
The CSSYB 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 CSSYB exam
There are no formal prerequisites to sit for the CSSYB exam. Candidates are encouraged to have prior Lean Six Sigma exposure, or some working knowledge of process improvement tools.
If you are unsure whether you’re ready, Lean Sigma Corporation also offers a CSSYB Certification Course designed to prepare candidates for this exam fully.
What the CSSYB Exam Validates
The CSSYB exam validates a candidate’s understanding of foundational Lean Six Sigma concepts and their ability to support structured improvement efforts within an organization. Specifically, the exam confirms knowledge of:
The CSSYB exam emphasizes conceptual understanding and practical awareness, not advanced statistical analysis. It is designed to confirm readiness to participate effectively in improvement activities and to build a solid foundation for future Green Belt or Black Belt development.
What Does CSSYB Exam Enrollment Include?
CSSYB exam enrollment includes two exam attempts along with the listed learning aids to help with exam preparation. Exam success delivers the additional items listed.
Exam Enrollment Includes
Exam Success Includes
Exam Body of Knowledge
Certified Six Sigma Yellow Belt Exam (CSSYB)
Certification Requirements
- Pass the CSSYB Exam (80%, 1 hour, 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
CSSYB 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
CSSYB Exam
CSSYB 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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CSSYB Exam
Certification Requirements
Frequently Asked Questions
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Certified Six Sigma Yellow Belt Exam (CSSYB)
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