CertificationPractice + Mock

Six Sigma Green Belt

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

180
Minutes
20
Questions
14,610
Learners
70%
Pass mark
★ Start here · Official guidance

From practice to the real exam

Verified sources
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 · 20 questions in the bank
Topic weights below mirror the real exam blueprint. To practise any single topic, use the Your study path panel on the right.
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
The experience

What to expect on test day

Timed simulation
Every mock runs under real exam time pressure. No pauses, no hints — exactly like the day.
Randomised questions
Every attempt draws fresh questions. You cannot memorise your way to a pass — you have to understand.
Integrity monitoring
Tab switches are logged in mock mode. Three switches auto-submits — same discipline as a real proctor.
Detailed results
Topic-by-topic breakdown, every answer explained, and a personalised 5-day study plan when you finish.
How to prepare

Certification study playbook

Four habits that move the needle most — pulled from how high-scorers actually study.

01
Start with the official exam blueprint — it tells you exactly what each domain carries.
02
Hands-on practice is irreplaceable for technical certifications — labs over reading.
03
Understand why answers are correct, not just memorise them — the real exam paraphrases.
04
Book your exam before you feel 100% ready. A fixed date forces real discipline.