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About this exam

The CSSC Six Sigma Green Belt (CSSC-CSSGB) is a professional credential issued by The Council for Six Sigma Certification to individuals who demonstrate a thorough understanding of enhanced problem-solving skills built around the DMAIC model - Define, Measure, Analyze, Improve and Control. A Green Belt is positioned as a trained team member who operates within his or her own function-specific area, taking on small, carefully defined Six Sigma projects that require less than a Black Belt's full-time commitment. The standard certification exam is a single comprehensive, open-book assessment of 100 multiple-choice and true/false questions drawn from the major sections of the Green Belt Body of Knowledge, completed in two hours, and available either online or at designated testing centers worldwide. Candidates are scored against 400 possible points and must reach 280 to earn the designation. There are no prerequisites and no project requirement at this level; a project participation requirement applies only to the advanced Level II Green Belt. Most candidates prepare through a qualified training provider or by working through the Council's free Self-Study Guide alongside the corresponding Body of Knowledge. The material on this page is independent study support and is not affiliated with, endorsed by, or sponsored by The Council for Six Sigma Certification.

What you'll study

Common questions

About CSSC Green Belt preparation

What is the format and length of the standard Green Belt exam?

It is a single comprehensive exam of 100 questions, made up of multiple-choice and true/false items drawn from the major sections of the Green Belt Body of Knowledge. You have two hours to complete it, and it can be taken online or at designated testing centers located worldwide.

Is the exam open book, and does that make it easy?

Yes, it is open book, and the Council encourages candidates to use its free Self-Study Guide while testing. Open book does not mean easy: 100 items in 120 minutes leaves roughly 70 seconds per question, so you need to know the material and know where to look rather than searching for every answer.

What score do I need to pass?

Candidates must achieve 280 points or higher out of a total of 400 possible points. That is equivalent to 70 percent of the available points, so it is not a marginal pass requirement - plan on solid coverage of all five DMAIC phases rather than strength in one area.

How many attempts do I get if I fail?

You have three attempts to pass with the required minimum score. If you are unsuccessful after three attempts, you must pay the examination assessment fee again. Note that once the fee is paid you have one year to successfully pass the exam, so the attempts are bounded by that window.

Are there prerequisites or a required project?

No. There are no prerequisites for sitting the Green Belt exam, and there is no project requirement for this certification. A project participation requirement applies only if you later pursue the advanced Level II Green Belt, for which this certification is a prerequisite.

Does the certification expire or need renewing?

No. CSSC certifications have no expiration date, so there are no renewal fees or continuing education requirements to maintain the designation. Candidates who simply want a more recent certification date can resit the exam at any time, which the Council notes is often cheaper than a typical renewal.

In what order should I study the Body of Knowledge?

Work through the phases in sequence - Define, Measure, Analyze, Improve, Control - because later tools assume earlier groundwork, such as a validated measurement system before capability analysis. Treat the Body of Knowledge as a checklist and confirm you can explain each listed tool, not merely recognize its name.

What are the most common ways candidates fail?

Running out of time is the classic failure mode: candidates over-invest in early statistical questions and leave the Control section unanswered. The second is shallow statistical fluency in Measure and Analyze - confusing variation sources, misreading control charts, or misapplying hypothesis tests. Third is skipping the 'softer' Define content such as charters and stakeholder analysis.

Is there an alternative to the single comprehensive exam?

Yes. The self-paced option costs $399 and consists of 24 chapter exams of 10 to 15 questions each, taken open book and untimed, with a minimum of 70 percent required on each. You receive unlimited attempts within 12 months and earn White, Yellow, Green and Black Belt certifications progressively without additional examination fees.