Validates knowledge of the DMAIC method, lean tools and the statistics needed to lead Six Sigma process-improvement projects.
A good Green Belt course covers all six sections of ASQ's Body of Knowledge, with enough statistics to handle the calculations in an open-book exam. We compared the main options on coverage of the 2022 BoK, length, depth and price.
Most people should start with Quality Gurus' Udemy course, which follows the ASQ outline in about 26 hours at a low price. Choose ASQ's own course when an employer pays, Ray Harkins for a short practical overview and the ASQ Handbook for reading and exam-day reference.
| Course | Best for | Format | Price |
|---|---|---|---|
 CSSGB Certification Preparation | Official ASQ course | Interactive | $824 |
 Certified Lean Six Sigma Green Belt Training (Accredited) | Low-cost video course | Video | $140 |
| Certified Lean Six Sigma Green Belt (2026) | Short practical overview | Video | $85 |
| ASQ CSSGB Handbook, 3rd edition | Learning by reading | Book | $150 |
ASQ's self-paced course of 42 hours across the six Body of Knowledge sections, with a pre-test to target your study, knowledge checks and a post-test. Access lasts 365 days. It comes from the exam's owner.
Great fit if you want structured lessons from the exam owner
Poor fit if you already work with DMAIC statistics and mainly need a reference for the open-book exam; choose the ASQ Handbook
About 26 hours of video lessons that walk through the DMAIC phases and statistics, with lessons marked as 2022 ASQ CSSGB updates and a downloadable summary book. Udemy's 30-day refund applies.
Great fit if you want a low-cost video course that follows the ASQ outline
Poor fit if you want ASQ's own materials; choose ASQ's course
About 10 hours of video on Lean and Six Sigma tools taught through DMAIC, with Excel templates, finance topics and a 50-question practice exam. It is the shortest course on this list.
Great fit if you want a shorter, practical overview of the tools
Poor fit if you need every topic mapped to the ASQ outline; choose Quality Gurus' course
A 636-page, section-by-section explanation of the 2022 Body of Knowledge. You can also bring it as your open-book reference on exam day, so reading it doubles as practice at finding answers.
Great fit if you learn well from reading and want one reference for study and exam day
Poor fit if you learn best from video; choose Quality Gurus' course
For most people, Quality Gurus' Udemy course: it follows the ASQ outline in about 26 hours at a low price. ASQ's own course is the official option.
No. ASQ's course is one option. Quality Gurus' course with the ASQ Handbook covers the same Body of Knowledge.
The courses here run from about 10 to 42 hours. Plan for about 80 hours of preparation in total, between 50 and 100.
Yes. The ASQ Handbook works as the reference you bring, so practise finding answers in it before exam day.