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, Measure, Analyze, Improve, Control). Green Belts typically work on quality projects alongside or under the guidance of a Black Belt.
EXAM AT A GLANCE
Questions
110
100 scored
Testing time
18
minutes
Sections
6
Delivery
Computer-based via Prometric (test center or remote proctored)
Passing score
550
Cost
$483 (non-member) / $383 (ASQ member), USD; retakes $283
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What the exam covers
Overview: Six Sigma and the organization
11%
Define
20%
Measure
20%
Analyze
18%
Improve
16%
Control
15%
About the Six Sigma Green Belt certification
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.
- Testing time
- 4 hours 18 minutes (within a ~4.5-hour appointment)
- Passing score
- 550 out of 750 (scaled)
- 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
Official exam page· Details verified August 2026
Exam details can change. Always confirm current requirements, fees, and exam policies with the certification provider before registering.
How to prepare
01
Confirm you meet the 3-year experience requirement in a Body-of-Knowledge area.
02
Study the DMAIC phases in order — they mirror the exam structure.
03
Learn the core statistical tools: process capability, hypothesis testing, and control charts.
04
Assemble a well-organized bound reference for the open-book exam.
05
Practice with the CSSGB Body of Knowledge and sample questions.
FAQ
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).
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