Six Sigma Green Belt

Six Sigma Green Belt

Offered by ASQ (American Society for Quality)

The ASQ Certified Six Sigma Green Belt (CSSGB) validates the ability to support and lead process-improvement projects using the DMAIC methodology (Define...

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Six Sigma Green Belt exam at a glance

Format

110 questions (100 scored + 10 unscored); multiple choice; open book (bound references allowed)

Duration

4 hours 18 minutes (within a ~4.5-hour appointment)

Delivery

Computer-based via Prometric (test center or remote proctored)

Passing score

550 out of 750 (scaled)

Exam cost

$483 (non-member) / $383 (ASQ member), USD; retakes $283

Validity

Does not expire (no recertification required for CSSGB)

Prerequisites

3 years of full-time paid work experience in one or more areas of the CSSGB Body of Knowledge

About the Six Sigma Green Belt certification

The ASQ Certified Six Sigma Green Belt (CSSGB) validates the ability to support and lead process-improvement projects using the DMAIC methodology (Define, Measure, Analyze, Improve, Control). Green Belts typically work on quality projects alongside or under the guidance of a Black Belt.

ASQ's is one of the most respected Six Sigma credentials because it requires documented work experience, not just a course.

Who it’s for: Professionals in operations, manufacturing, quality, and process improvement roles.

Official exam page· Details verified 2026-08

What the Six Sigma Green Belt exam covers
  • Overview: Six Sigma and the organization
    11%
  • Define
    20%
  • Measure
    20%
  • Analyze
    18%
  • Improve
    16%
  • Control
    15%
How to study for the Six Sigma Green Belt
  1. 1Confirm you meet the 3-year experience requirement in a Body-of-Knowledge area.
  2. 2Study the DMAIC phases in order — they mirror the exam structure.
  3. 3Learn the core statistical tools: process capability, hypothesis testing, and control charts.
  4. 4Assemble a well-organized bound reference for the open-book exam.
  5. 5Practice with the CSSGB Body of Knowledge and sample questions.
Six Sigma Green Belt — frequently asked questions

Is the Six Sigma Green Belt exam open book?

Yes. You may bring your own bound reference materials, but no loose notes or electronic devices.

Do I need experience to get ASQ's Green Belt?

Yes. ASQ requires three years of full-time paid experience in a Body-of-Knowledge area (no project affidavit is required for Green Belt).