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Lean Six Sigma Green Belt Certification Basics

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By: Shimon Brathwaite

April 20, 2021

What is a lean Six Sigma green belt?

An IASSC Certified Lean Six Sigma Green Belt (ICGB) is a professional who is well versed in the elements of Lean Six Sigma methodology. Someone who has achieved this certification leads improvement projects or serves as part of a team whose goal is process improvement. Lean Six Sigma improves performance by removing waste and reducing variability. It can also provide a framework for changing the overall organizational culture. It encourages employees to focus on growth and continuous improvement through process optimization. Six Sigma Green Belt is a five-level group (white, yellow, green, black, and master black).

What is the Lean Six Sigma Green Belt course?

Cybrary offers the Lean Six Sigma Green Belt course which teaches how and where to apply the Six Sigma process improvement methodologies to pass the exam. It commences with an overview of the material taught in the yellow belt course, which precedes the green belt material. Next, it teaches how to understand stakeholders' needs by defining the "voice" of the business, customers, and the business process. After this, the modules go into the different project management elements and include best practices for project management, the different phases of project management, managing the schedule, popular project management tools and techniques, and measuring improvement through statistics and metrics. It's important to note that this is not an introductory-level course. It is meant for professionals that already have project management experience and are looking to deepen their understanding to lead projects. This course will develop competency in all Six Sigma methodology phases: define, measure, analyze, improve, and control. At the green belt level, Six Sigma candidates are expected to:

  • Operate with the support of or under the management of a Six Sigma Black Belt.
  • Analyze and solve quality issues.
  • Be involved in projects to improve quality.
  • Have participated in but have not yet led quality projects.
  • Have at least three years of relevant work experience.
  • Demonstrate knowledge of Six Sigma processes and tools.

What is the Lean Six Sigma Green Belt practice exam?

In addition to having a course that teaches the material, Cybrary also offers a practice exam course. Six Sigma Green Belt certification is attained when one scores at least 80% on the exam. This passing mark is quite high compared to other certifications, and students must be fully prepared to avoid paying the exam fee ($295) multiple times. Students thinking about taking the ICBG exam can take Cybrary's practice exam to prepare for the certification. This practice exam is meant to simulate the actual exam and is a good gauge of preparedness.

Who should pursue the Lean Six Sigma Green Belt certification?

If you're interested in any project management role, then ICBG may be useful. Professionals who earn this certification demonstrate that they can analyze and solve quality issues, improve the processes within any project they are assigned to, and know Six Sigma processes and techniques. On average, professionals who gain the Green Belt level certification have salaries over $100,000 per year.


Lean Six Sigma can be a good certification for someone who aspires to work in project management. The Lean Six Sigma series is focused on teaching candidates how to prevent errors, risks, and defects in production through continuous process improvement. The Green Belt is at the third level of this series and is for professionals with a solid project management understanding and the previous levels. In addition to a course on Six Sigma, Cybrary also offers a practice exam that candidates can take to ensure that they are at the level required to pass the official exam.

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