Black Belt: The purpose of the black belt is to train project teams and lead problem-solving projects.
Yellow Belt: Yellow belt acts as a subject matter or a project team member to review process improvements that ensure the success of the project.
Green Belt: Green belt handles smaller projects alone or coordinates with six sigma teams to improve process quality. It assists in bridging the gap between the real-world application and the Six Sigma theory. It plays a central role in data inspection, process improvement, and utilize DMAIC (Define, Measure, Analyze, Improve, and Control) skills while managing Six Sigma projects.