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Lean Six Sigma Green Belt Study Guide (2026)

This is the free study guide for the Lean Six Sigma Green Belt exam — the same content areas the exam tests, written to the official outline. Read any chapter online free below, then drill the material with 22+ free practice questions and a full timed mock exam.

Last updated: August 2026.

Open the full study guideEvery chapter, in one place — free to read online.

The 5 chapters

  1. 1Define18% of the exam
  2. 2Measure22% of the exam
  3. 3Analyze22% of the exam
  4. 4Improve20% of the exam
  5. 5Control and Lean Fundamentals18% of the exam

Practice what you read

Reading is step one; recalling it under exam pressure is what passes. Drill free Lean Six Sigma Green Belt practice questions, then sit a full timed mock exam.

Free practice questions →Timed mock exam →Cram sheet →

Educational summary, not a substitute for the official material — always confirm current details with ASQ Six Sigma Green Belt (CSSGB) certification. Last updated: August 2026.

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