Registering for the GAQM Certified Lean Six Sigma Black Belt (CLSSBB) exam costs USD 220 (exam voucher), and you need 70% (70/100) to pass. One detail worth remembering: a failed attempt is not discounted — retaking the exam means paying USD 220 (exam voucher) again in full. Use the ActualTestsIT test engine to benchmark yourself first; when your mock results consistently clear 70% (70/100), you are ready to book.

The CLSSBB exam is GAQM's official test for the Certified Lean Six Sigma Black Belt credential, a certification at the Professional / Black Belt level. Earning it tells employers your skills have been verified by the vendor itself, which carries real weight in hiring and promotion decisions. Within the same certification track, it sits alongside CLSSGB (Green Belt), CLSSC (Champion), CLSSMBB (Master Black Belt), so it can also serve as a stepping stone toward those credentials.

GAQM divides the GAQM Certified Lean Six Sigma Black Belt (CLSSBB) exam into 5 domains. The largest ones are Measure Phase at 25%, Organizational Roadblocks and Lean Management at 15%, Improve and Control Phase at 20% — together these account for the bulk of your score, so start there. The complete domain-by-domain outline appears in the exam topics section above on this page.

Two layers of protection here. First, delivery: your CLSSBB product is available for instant download, and a copy lands in your email within one minute of payment — if 2 hours pass with nothing (check spam first), our support team will resend it. There is no cap on how many computers you can install it on. Second, the refund policy: if you take the CLSSBB exam within 60 days of purchase and fail, you may claim a full refund. The claim needs a scanned enrollment slip plus your official Score Report PDF, filed within 2 days after the exam, and it is settled within 7 days. The policy covers only the corresponding exam — attempts within 3 days of purchase, exams never actually taken, free materials, and expired orders are excluded, and the candidate's name must match the payer's. If you would rather keep studying, you can instead exchange your product for two free exam products of equal value and keep the update service on your original purchase.

You will face 100 questions in 120 minutes on the GAQM Certified Lean Six Sigma Black Belt (CLSSBB) exam. Do the math and the per-question budget is tight, which is why pacing drills matter as much as content review. Our advice: take two or three full timed mocks in the ActualTestsIT engine before the real thing, and practice skipping a stubborn question instead of burning five minutes on it.

Yes — GAQM lists these official training options for GAQM Certified Lean Six Sigma Black Belt (CLSSBB) candidates:

• GAQM Official E-Course

Formal training teaches the syllabus; then the 357 practice questions from ActualTestsIT show you whether that knowledge holds up under real exam conditions.

Of course. ActualTestsIT publishes a free PDF demo for the GAQM Certified Lean Six Sigma Black Belt (CLSSBB) exam so you can review real sample questions and answers first. Every purchase also includes 365 days of free updates, and after that period you can renew the update service at a 50% discount directly from your member zone.

No mandatory prerequisites; CLSSGB recommended but not required Eligibility rules are set by GAQM and do change from time to time, so double-check the latest requirements on the official exam page at https://gaqm.org/certifications/lean_six_sigma/clssbb before you register.

Registration for the CLSSBB exam runs through these official channels:

• Official GAQM Registration