IASSC Certified Lean Six Sigma Black Belt
ICBB
A Black Belt-level exam on the Six Sigma track, covering Define, Measure, Analyze, and more, rated hard in difficulty, recommended for candidates with at least 24 months of hands-on experience, consisting of 150 questions in 240 minutes. Prepare with professionally curated practice questions and walk into exam day with confidence.
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Exam Details
- Time Limit
- 240 min
- Exam Questions
- 150
- Exam Fee
- $995
- Format
- multiple-choice
- Difficulty
- Hard
- Exp. Needed
- 24 months
- Free Questions
- 15
- Languages
- English
What the ICBB Exam Covers
5 official domains
Define
Measure
Analyze
Improve
Control
Who Should Take This
ICBB target roles
Certification Path
Black Belt · Six Sigma
| Prerequisites | Green Belt recommended |
|---|---|
| Current Exam | ICBB |
| Next Step | Master Black Belt |
ICBB exam guide
How hard is the ICBB exam?
The ICBB is rated hard in difficulty, most candidates prepare with at least 24 months of hands-on experience. Difficulty varies with your existing hands-on practice, so use the sample questions on this page to gauge where you stand before booking the real test.
How long should you study for the ICBB?
A practical plan for this difficulty level is 12–16 weeks of focused study at one to two hours a day. Split the time across the official domains below, finish each domain with practice questions, and reserve the final two weeks for full-length timed practice and review of missed questions.
What is the ICBB exam format?
Expect around 150 questions, 240 minutes to complete, formats include multiple-choice, the official exam fee is $995 USD. It is offered in English. Check your local testing provider for delivery options and any regional pricing differences.
Who should take the ICBB exam?
This is a black belt-level certification, the prerequisite is green belt recommended, typical target roles include process improvement manager, quality assurance manager, operations manager. If the role you are aiming for appears on that list, the credential is a direct investment in your next job move rather than a general-purpose certificate.
What comes after the ICBB?
Candidates who pass usually continue with Master Black Belt, this exam sits on the Six Sigma track. Map the whole path before you start studying so each certificate builds on the previous one instead of repeating the same ground.
How do you renew the ICBB certification?
renewal is possible via none (lifetime). Plan the renewal before the expiry date so the credential never lapses on your CV or job application.
Certification FAQ
Other ways to test for ICBB
15 free questions available — two ways to use them.
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