Everything you need to know about how the LSS Green Belt exam is structured — questions, time, scoring, and exactly how the marks are distributed.
100 multiple-choice and true/false questions (some forms add up to 10 unscored pilot items) in 180 minutes, closed book with a formula/reference sheet provided in the exam interface. Delivered online-proctored or at test centres by PeopleCert. No course or project required — unlike ASQ's version.
PeopleCert publishes how the 100 questions are distributed (IASSC Lean Six Sigma Body of Knowledge for Green Belts (ILSSBOK) — ~20 questions per DMAIC phase). Weight your preparation to match — this is the single most useful planning fact:
| Area | Weight | |
|---|---|---|
| Define | 20% | |
| Measure | 20% | |
| Analyze | 20% | |
| Improve | 20% | |
| Control | 20% |
Define is the heaviest at 20% — most candidates under-weight it.
6 free questions · explanation for every option · per-area readiness · no dumps.
Start free →No — IASSC/PeopleCert ICGB and ASQ CSSGB are separate certifications with different bodies of knowledge and rules. IASSC requires no project or work experience; ASQ requires a project affidavit or years of experience.
Green Belt depth: descriptive statistics, normal distribution, hypothesis testing (p-values, alpha/beta risk), ANOVA-level concepts and simple regression. A formula/reference sheet is provided — interpretation matters more than computation.
No — passing the proctored exam is the only requirement, plus recertification every 3 years via a shorter exam.
100 multiple-choice and true/false questions (some forms add up to 10 unscored pilot items) in 180 minutes, closed book with a formula/reference sheet provided in the exam interface.
The passing score is 70% of total available points (questions carry difficulty weights of 1–3 points). Aim for a consistent 80–85% on realistic practice exams before booking.
PeopleCert does not publish official pass rates, so any exact percentage quoted online is unverified. The readiness signal that actually predicts passing: consistently holding 80–85% on realistic, full-length practice exams before you book.
None — IASSC/PeopleCert require no training course, work experience or completed project (in contrast to ASQ).
Three official price points for one exam (all verified 22 Sep 2026): IASSC's certification page still says $350, IASSC's own store charges $402 for the Green Belt voucher, and PeopleCert - which owns IASSC and delivers the exam - listed €361, about $415, on the storefront it served us (prices are country-specific and the page states no VAT treatment). Nothing includes training or a practice exam: IASSC's evaluation exam is $78, PeopleCert's mock €62. The recertification voucher is $268 in IASSC's store and €243 at PeopleCert (50 questions, 90 minutes, same 70% pass mark).
For most candidates, commonly reported 40–80 hours depending on prior statistics background. What matters most is practising questions and analysing why each option is right or wrong — not just reading.
Every 3 years - a 50-question, 90-minute recertification exam at 70%, max two attempts two weeks apart; $175 on IASSC's policy page but $268 in IASSC's store and €243 via PeopleCert (verified 22 Sep 2026).
No — every question is original, written to test the concepts and reviewed before it ships, with an explanation linked to the source for every option. Dumps are stale, often wrong, and against PeopleCert's policies.