Business & PM

Six Sigma Green Belt

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Six Sigma Green Belt

IASSC / ASQ Lean Six Sigma Green Belt — DMAIC process improvement

20-question mock60 min70% pass markInternational

Single questions with instant feedback — no timer, learn as you go.

See official guidance ↓
Start here · Official guidance

From practice to the real exam

01
Pick a certifying body
No single global standard — ASQ, IASSC, and CSSC are the most-recognised bodies. ASQ's Certified Six Sigma Green Belt (CSSGB) is the gold standard in the US.
02
Check eligibility (ASQ)
ASQ requires 3 years of work experience in one or more areas of the Green Belt Body of Knowledge. IASSC and CSSC have no experience requirement.
03
Use the BoK + practice tests
Study DMAIC, basic statistics, Lean concepts, and process improvement. ASQ publishes the official Body of Knowledge.
04
Apply and schedule
ASQ exam fee USD 438 (member) / USD 538 (non-member). 110 questions, 4h 18m. Computer-delivered at Prometric.
05
Maintain the credential (ASQ)
ASQ requires 18 recertification units (RUs) every 3 years.
Official resources
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Exam blueprint

What this exam covers

5 topics · drawn across your practice and mock
01Statistical tools
35%7 questions
02Lean principles
25%5 questions
03DMAIC framework
20%4 questions
04Process mapping
15%3 questions
05Project selection
5%1 question
Your study path
Master this exam, topic by topic
Drill one topic at a time. After each session you'll see where you went wrong and can retake until you've got it.
Questions per session
View full mastery board →
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Frequently asked questions

Is the Six Sigma Green Belt practice test free?

Yes. The core Six Sigma Green Belt practice on AceMark is free to start — no credit card needed. Sign in (takes 10 seconds) if you'd like to track your progress, save attempts, and unlock the Mentor. Otherwise, browse and explore questions without an account.

How many questions are in the Six Sigma Green Belt quiz?

Each Six Sigma Green Belt attempt draws 20 questions and runs for about 180 minutes under realistic timed conditions.

Can I retake the Six Sigma Green Belt test, and are the questions randomised?

Yes. Every attempt pulls a fresh, randomised set of questions, so you can't memorise your way through — you retake it until you genuinely know the material.

What score do I need to pass the Six Sigma Green Belt?

The pass mark used in this simulation is 70%. AceMark scores every attempt instantly and shows which topics to review.