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ASQ · Project Management & Agile · Professional

ASQ Certified Six Sigma Green Belt (CSSGB) exam guide

Exam CSSGB

The ASQ Certified Six Sigma Green Belt (CSSGB) validates the ability to support and lead DMAIC improvement projects using statistical tools. ASQ's credential is exam-based and proctored, which makes it more rigorous and widely respected than many training-company green belts.

Questions110 (100 scored, 10 unscored)
Time limit258 minutes
Passing score550 (scaled, out of 750)
Exam fee$483 USD
Valid forSee official page
DeliveryPrometric computer-based testing (paper-based in some locations)

Format: Multiple choice, open book. Fee note: ASQ members save USD 100 on the initial fee; retake USD 283.

Who it's for

Quality engineers, process improvement specialists, operations and manufacturing staff who work on or lead Lean Six Sigma projects.

What the exam covers

Overview: Six Sigma and the Organization11%
Define20%
Measure20%
Analyze18%
Improve16%
Control15%

Eligibility & prerequisites

Required: Three years of full-time, paid work experience in one or more areas of the CSSGB Body of Knowledge; no educational waivers.

Recommended: Participation in DMAIC projects and comfort with basic statistics and Minitab or similar tools.

Keeping it active

CSSGB is a lifetime certification with no recertification requirement.

Skills & careers

Skills it validates

  • DMAIC project execution
  • Process mapping and SIPOC
  • Measurement system analysis
  • Hypothesis testing and regression
  • Root cause analysis
  • Statistical process control charts

Job roles

Quality EngineerProcess Improvement SpecialistContinuous Improvement AnalystOperations AnalystManufacturing EngineerLean Six Sigma Green Belt

Where it fits in your path

Take before

No prerequisite certification needed.

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ASQ Certified Six Sigma Green Belt (CSSGB)

Planning a degree too? See how this cert earns college credit in the College Credit Navigator.

Build my study plan

  1. Weeks 1-2: Download the CSSGB BoK; review Six Sigma overview and Define tools (charters, VOC, SIPOC).
  2. Weeks 3-5: Measure: data types, sampling, MSA, capability indices; work numerical problems.
  3. Weeks 6-7: Analyze and Improve: hypothesis tests, ANOVA, regression, DOE basics.
  4. Week 8: Control: SPC chart selection, control plans.
  5. Weeks 9-10: Build a tabbed reference binder and take full timed practice exams.

Make it yours: pick your exam date and weekly hours. We'll split your time by domain weight and give you a printable plan.

Exam-day tips

  • It is open book; bring a tabbed reference (e.g. The Certified Six Sigma Green Belt Handbook) and a formula sheet.
  • Bring an approved calculator and practice capability and hypothesis calculations with it.
  • Know which control chart fits which data type and subgroup size.
  • Pace at about 2.3 minutes per question; do not over-research single items.
  • Measure and Define together are 40% of scored items.

Key terms for this exam

All 99 terms Study with thinQcards™

Frequently asked questions

How much does the CSSGB cost?

USD 483 for nonmembers; ASQ members save USD 100. Retakes are USD 283.

Does ASQ Green Belt expire?

No. CSSGB is a lifetime certification.

Is the CSSGB open book?

Yes. You can bring bound reference materials.

ASQ CSSGB vs IASSC Green Belt?

Both are exam-based; ASQ requires three years of experience and is typically more respected in US manufacturing and healthcare.

What is the passing score?

550 out of 750 on ASQ's scaled score.

Official page: www.asq.org. Reviewed November 2026. Vendors change fees and objectives, so confirm with the vendor before you book. Spot something out of date? Tell us.