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The ASQ Certified Six Sigma Green Belt — Requirements & Free Practice

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The ASQ Certified Six Sigma Green Belt

An ASQ-branded professional certification administered by ASQE recognizing proficiency in Six Sigma tools, quality problem-solving, and process improvement; it is not a license or registration.

Licensing authority: ASQExcellence (ASQE)

Initial by examination
The ASQ Certified Six Sigma Green Belt
Applicability
Current CSSGB page links the 2022 CSSGB BoK and advertises the selected December 2026 examination window; neither the credential nor the route has an officially published start date in these materials. The window is not the version's effective period.
Application Agreements
Read and agree to the ASQE Testing Agreement and ASQ Code of Ethics as part of the completed certification application under the Candidate Handbook, p. 12.
Examination
Pass the one-part CSSGB certification examination; the selected route uses the English computer-delivered examination.
Experience
Three years of work experience in one or more CSSGB Body of Knowledge areas in a full-time, paid role; educational waivers are not granted.
Professionalism
Provide proof of professionalism as a separate certification award criterion under the Candidate Handbook, p. 3.
Selected Window
2026-12-01 through 2026-12-31; application deadline 2026-11-09.

The ASQ Certified Six Sigma Green Belt

Provider
Prometric
Format
English computer-delivered, one-part, open-book multiple-choice examination; each question has one correct answer.
Exam questions
Total questions: 110; Scored questions: 100; Unscored questions: 10; The total includes the scored and unscored questions.
Time limit
4 hours and 18 minutes of examination time; 4 hours and 30 minutes total appointment time.
Examination outline
  • Overview: Six Sigma and the Organization (11%)
    • Six Sigma and Organizational Goals
    • Lean Principles in the Organization
    • Design for Six Sigma (DfSS) Methodologies
  • Define Phase (20%)
    • Project Identification
    • Voice of the Customer (VoC)
    • Project Management Basics
    • Management and Planning Tools
    • Business Results for Projects
    • Team Dynamics and Performance
  • Measure Phase (20%)
    • Process Analysis and Documentation
    • Probability and Statistics
    • Statistical Distributions
    • Collecting and Summarizing Data
    • Measurement System Analysis (MSA)
    • Process and Performance Capability
  • Analyze Phase (18%)
    • Exploratory Data Analysis
    • Hypothesis Testing
    • Additional Analysis Methods
  • Improve Phase (16%)
    • Design of Experiments (DoE)
    • Implementation Planning
    • Lean Tools
  • Control Phase (15%)
    • Statistical Process Control (SPC)
    • Sustain Improvements
    • Lean Tools for Process Control
Examination sources