Six Sigma Green Belt Certification
Join the elite league of Six Sigma Green Belt certified professionals
Master the DMAIC framework and learn to find fast, cost-effective solutions to real business problems, from the ExpertRating Six Sigma Green Belt Certification Program.
Develop practical skills for identifying process problems, reducing waste and defects, controlling costs, and supporting better quality and customer satisfaction across manufacturing, healthcare, IT, logistics and other industries.
Earn an online credential that demonstrates your understanding of Six Sigma principles and prepares you to contribute to process-improvement projects with confidence.
For just $99.99.
Certification
About the Six Sigma Green Belt Certification
The ExpertRating Six Sigma Green Belt Certification is a 185-page, self-paced online course designed for beginners and experienced project professionals who want to build their knowledge of Six Sigma principles and process-improvement tools.
Six Sigma skills are used in areas such as manufacturing, healthcare, IT, logistics and operations, where professionals work to understand process variation, identify root causes and improve efficiency.
The course covers established Six Sigma tools and techniques through the DMAIC framework: Define, Measure, Analyze, Improve and Control. Review the curriculum below for a detailed phase-by-phase breakdown of the topics included.
Why Get Certified?
The ExpertRating Six Sigma Green Belt Certification helps demonstrate your understanding of Six Sigma principles and the DMAIC framework to employers and clients. The program includes in-depth online courseware, practical examples, expert tips and an online multiple-choice examination, helping you build knowledge that can support process-improvement work.
Who Should Enroll
Manufacturing and operations professionals who want to strengthen their process-improvement knowledge and earn an ExpertRating-issued credential.
Healthcare, IT and logistics professionals interested in applying Six Sigma principles outside traditional manufacturing.
Project managers and team leads who want to develop DMAIC knowledge for supporting improvement initiatives.
Career switchers and beginners seeking a structured introduction to Six Sigma and quality management.
Curriculum
What You Will Learn: DMAIC Curriculum
The course builds a structured foundation that can help you understand and support Six Sigma process-improvement initiatives.
Explore the principles, tools and statistical methods used throughout the Six Sigma DMAIC cycle. The course covers process definition and measurement, root-cause analysis, improvement methods and control planning, providing a structured foundation for process-improvement work.
Introduction to Six Sigma
- Understand the fundamentals of Six Sigma and the Six Sigma deployment process.
- Explore Six Sigma implementation and its supporting toolkit.
- Learn how DMADV and Design for Six Sigma—or DFSS—relate to Six Sigma methodology.
Define
- Define project goals, expected benefits and the process being examined.
- Explore the Kano Model, survey construction and margin of error.
- Learn about focus groups and Critical-to-Quality trees.
- Develop process maps using matrix diagrams, activity network diagrams and the 7M tools.
Measure
- Use histograms and probability plots to examine process data.
- Understand basic process capability and process variation.
Analyze
- Examine the nature and flow of work within a process.
- Apply root-cause analysis to investigate process problems.
- Use scatter diagrams and run charts to examine relationships and performance.
- Explore hypothesis testing, t-tests, chi-square tests and analysis of variance.
- Learn how to quantify an improvement opportunity.
Improve
Failure Mode and Effects Analysis (FMEA) for anticipating and reducing risk in a redesigned process
Control
- Understand the purpose of the Control phase.
- Explore control methods, tools and techniques used in control planning.
Appendix
- Review detailed answers to frequently asked Six Sigma questions.
- Learn how critical values are identified using significance levels, degrees of freedom and statistical distribution tables.
- Calculate individual and cumulative percentages for constructing a Pareto chart.
- Follow a worked prioritization-matrix example covering decision criteria, percentage weights, option ratings, weighted scores and final selection.
Course logistics
Training Delivery: Flexible, Self-Paced Online Training
This is a self-paced, self-study online course, not a live instructor-led program, so you can access it anytime from your computer, tablet, or phone.
- For taking this course, you need internet access, an email account, and any web browser.
- The fee is all-inclusive and covers the in-depth Six Sigma Green Belt courseware and the exam.
- Most people complete the course in 2 to 4 weeks, studying 1 to 2 hours a day.
- If you do not pass the exam, you can re-attempt it for $20, up to three times.
- The certification can be renewed after one year for a $30 fee, which issues a new downloadable PDF certificate.
- You retain access to your study material at any point after successfully completing the certification.
Credentials
Understanding Six Sigma Credentials: ASQ, IASSC, and ExpertRating
Six Sigma credentials are issued by multiple independent providers, and there is no single credential universally required by every employer. Two established options are the ASQ Certified Six Sigma Green Belt (CSSGB) and the PeopleCert Lean Six Sigma – IASSC Certified Green Belt (ICGB). ExpertRating offers its own Six Sigma Green Belt course and certification exam.
ExpertRating is not affiliated with, approved by, or accredited by ASQ or IASSC.
The appropriate option depends on an employer’s requirements, the candidate’s experience, preferred assessment format, training needs and budget:
- ASQ Certified Six Sigma Green Belt (CSSGB): Requires three years of full-time, paid work experience in one or more areas of the CSSGB Body of Knowledge. Candidates complete an open-book examination available through approved testing formats, including computer-delivered options.
- PeopleCert Lean Six Sigma – IASSC Certified Green Belt (ICGB): Has no formal prerequisite. Candidates complete a 100-question, 180-minute, closed-book examination with a 70% passing score.
- ExpertRating Six Sigma Green Belt Certification: Designed for beginners and experienced professionals, with self-paced online courseware and an online multiple-choice exam. The initial $99.99 fee includes the courseware, exam, online transcript and downloadable certificate after passing.
If a job description requires an ASQ, IASSC or PeopleCert credential, confirm that requirement with the employer before purchasing the ExpertRating program.
| Provider | Typical Cost | Prerequisites | Format |
|---|---|---|---|
| ExpertRating Six Sigma Green Belt | $99.99 | No education or work-experience prerequisite stated | Self-paced online course + online exam multiple-choice exam |
| ASQ Certified Six Sigma Green Belt (CSSGB) | $483 initial exam fee, with members saving $100—effectively $383 for eligible members | Verified work experience; no educational waiver | Proctored exam (in-person or online) |
| IASSC Certified Lean Six Sigma Green Belt PeopleCert Lean Six Sigma – IASSC Certified Green Belt (ICGB) | $402 | None | Closed-book proctored exam |
Career
Career Prospects for Six Sigma Green Belts
Six Sigma knowledge is used in roles involving quality management, process improvement, operational efficiency and data-driven problem-solving across industries such as manufacturing, healthcare, automotive, electronics and transportation.
As of August 1, 2026, Salary.com reports an average U.S. salary of $119,800 per year, or approximately $58 per hour, for the job-title benchmark “Six Sigma Green Belt.” The reported 25th-to-75th-percentile salary range is $110,300 to $129,700. Actual compensation varies by position, experience, employer, industry and location.
The U.S. Bureau of Labor Statistics does not publish projections specifically for Six Sigma Green Belts. For management analysts—a related but broader occupational category focused on improving organizational efficiency—BLS projects 9% employment growth from 2024 to 2034, compared with 3% for all occupations. Approximately 98,100 management-analyst openings are projected annually over the decade, including openings created by worker replacement.
Verified Market Research estimates that the global Lean and Six Sigma services market was valued at $6.8 billion in 2024 and could reach $13.25 billion by 2032, representing a projected compound annual growth rate of 8.7%. This forecast indicates expected growth in the broader market for Lean and Six Sigma services; it is not a direct forecast of Green Belt jobs or certification demand.
Six Sigma skills may support careers in process engineering, quality assurance, operations, project management and continuous improvement. Employers determine which experience and credentials they require, and completing this certification does not guarantee employment, promotion or a particular salary.
Roles Six Sigma Green Belts Fill
Six Sigma Green Belt knowledge can support professionals working in quality management, process improvement, engineering, operations and project delivery. Relevant job titles vary by employer and industry and may include:
- Manufacturing and engineering: Manufacturing Engineer, Process Engineer, Process Improvement Engineer, Quality Engineer and Reliability Engineer.
- Operations and continuous improvement: Operations Manager, Warehouse Operations Manager, Continuous Improvement Specialist, Operational Excellence Manager and Director of Performance Excellence.
- Projects and technology: Project Manager, IT Project Manager, Project Engineer and Business Process Manager.
- Process and quality analysis: Process Improvement Analyst, Business Process Analyst, Quality Analyst and Operations Analyst.
- Advisory roles: Lean Six Sigma Consultant, Process Improvement Consultant and Lean Six Sigma Advisor.
Certification
Certificate and Trust
Your certification package includes a downloadable professional certificate, an online transcript showing your exam score, and proof of certification for employers and clients. A hard copy of the certificate can be optionally purchased and delivered to your physical address for an additional fee.
ExpertRating is ISO 9001:2015 certified and a member of the Institute for Credentialing Excellence (I.C.E.), reflecting adherence to internationally recognized quality-management standards. On Trustpilot, ExpertRating holds a 4.7 TrustScore across 1,356 reviews.
Over 6,500 companies rely on ExpertRating for training and testing, including Walmart, IKEA, Google, Ericsson, Gap, and Dell. ExpertRating delivers over 3 million online certifications and tests annually, with a 86% reorder rate among corporate clients.
Pricing
Pricing and How It Compares
ExpertRating remains one of the most accessible ways to build Six Sigma Green Belt knowledge and a verifiable credential, especially compared to proctored, prerequisite-based programs.
Note: *Prices checked August 24, 2026. Prices, taxes, membership savings, currencies and regional availability can change. Confirm current pricing on each provider’s official website before purchasing.
The ASQ and PeopleCert figures cover their certification examinations and do not include optional preparation courses or third-party training. The ExpertRating price includes its online courseware and final exam, but retakes, renewal and an optional hard-copy certificate carry additional charges.
ExpertRating is not affiliated with, approved by, or accredited by ASQ or IASSC.
Testimonials
Our Customers Love Us
“My Six Sigma Green Belt certification helped me lead process-improvement initiatives with greater confidence, contributing to over $300,000 in annual cost savings and improved productivity.”
“The certification demonstrated my Six Sigma proficiency and helped me participate in decision-making for important organizational process-improvement initiatives.”
“My Six Sigma Green Belt certification added professionalism and credibility to my résumé and helped me discuss process improvements that save clients money.”
“My Six Sigma Green Belt certification helped me gain recognition for process-improvement projects and led to my selection for an internal Green Belt program.”
“The Green Belt certification helped me understand quality processes in high-volume manufacturing and added credibility to my performance with my employer.”
“Having a Six Sigma Green Belt Certification on my résumé is a major advantage and a valuable asset across industries.”
"Quick and easy certifications." - Charles V Ponder, verified Trustpilot review
"The program was a complete study guide, helpful in understanding all topics." - Frank Ciraulo, Trustpilot review
"Enjoyed the information. Let me know if you are doing another Six Sigma Green Belt Course class." - Desmar Walkes
FAQ
Frequently Asked Questions
No. ExpertRating is not affiliated with, approved by, or accredited by ASQ or IASSC or PeopleCert. It is ExpertRating's own certification. ExpertRating is ISO 9001:2015 certified and is a member of the Institute for Credentialing Excellence.
If a position specifically requires an ASQ or PeopleCert IASSC credential, confirm the employer’s requirements before enrolling.
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