The Lean Six Sigma Green Belt Exam: A milestone to Continuous Improvement

green belt exam

Lean Six Sigma, a methodology that strives to continuous improvement, has taken the business world by storm. It’s a systematic approach used to enhance productivity, reduce waste, and improve the overall quality of processes. At the heart of this methodology is the certification hierarchy, with the Green Belt ranking as one of the most recognized. If you’re considering taking the Lean Six Sigma Green Belt exam or just want to learn more about it, this article is your guide.

What is the Lean Six Sigma Green Belt Certification?

Before diving into the specifics of the exam, it’s vital to understand what a Green Belt certification signifies. A Lean Six Sigma Green Belt certified individual is proficient in using the Lean Six Sigma methodology and has demonstrated this knowledge (theoretical exam) and skills (project).

They are often employees who work on projects part-time while performing their regular job roles. Green Belts have a solid grasp of the Define, Measure, Analyse, Improve, and Control (DMAIC) method, which is a systematic approach to problem-solving.

Why Should You Consider a Green Belt Certification?

  • Career Enhancement: The Green Belt certification is globally recognised and adds significant value to your professional profile. It often paves the way for better job opportunities and increased earning potential.
  • Skills Acquisition: By preparing for the exam, you’ll gain a deeper understanding of the Lean Six Sigma methodology and its application, enhancing your analytical, problem-solving, and project management skills.
  • Organisational benefits: Organisations benefit from having Green Belt certified individuals because they can spearhead process improvement projects, reducing costs and increasing customer satisfaction.

What’s on the Lean Six Sigma Green Belt Exam?

You are given 75 minutes to complete the digital Green Belt exam. It consists of a mix of around 32 knowledge/insight questions, Lean Six Sigma statements and multiple-choice questions. You will have passed your exam at a score of 75% or higher. The exams is ‘open book’ and you are allowed to bring your digital book, notes and a calculator along to help you. For the electronic exam you will need your own device (e.g. laptop, tablet, or smartphone) to do the exam.

The main topics covered include:

  • DMAIC Methodology: Expect questions on each phase of the DMAIC method—Define, Measure, Analyse, Improve, and Control.
  • Lean Principles: Questions about waste elimination, continuous flow, pull systems, and value stream mapping are common.
  • Six Sigma Tools: Statistical tools like control charts, histograms, pareto charts, cause and effect diagrams, hypothesis testing, and regression analysis may be covered.
  • Project Management: As a Green Belt, you’ll be leading projects, so expect questions related to project charter, team dynamics, and change management.

Preparing for the Exam

To excel in the Green Belt exam, follow these steps:

  1. Training: Enrol in a recognised Lean Six Sigma Green Belt training programme. These programs provide a structured approach to the syllabus and offer practical insights through case studies and real-life examples.
  2. Self-Study: Invest in good reference books and online resources. Make sure you understand the core concepts and can apply them to real-world situations.
  3. Practice Tests: Mock tests and sample questions give you a feel for the actual exam. They help in identifying areas where you need more preparation.

Tips for Exam Day

  1. Stay Calm: It’s natural to feel anxious, but remember, you’ve prepared well. Take deep breaths and approach the exam with confidence.
  2. Manage Your Time: Keep an eye on the clock. If you find yourself stuck on a question, move on and return to it later.
  3. Read Questions Carefully: Sometimes, the difference between a correct and incorrect answer lies in the nuances of the question.


The Lean Six Sigma Green Belt exam is a rigorous test of your knowledge of the Lean Six Sigma principles. Passing it is a testament to your dedication to continuous improvement and process excellence.

Remember, Lean Six Sigma is not just about passing an exam; it’s about cultivating a mindset of relentless pursuit of excellence and the ability to drive impactful change. Good luck on your journey!