1. Six Sigma improvement efforts require contributions from Executive Leaders, Project Champions, Master Black Belts, Black Belts, and Green Belts, each with different defined roles.
2. Executive Leaders keep Six Sigma focused on business problems and strategic goals, while Project Champions translate goals to individual units.
3. Master Black Belts are technical leaders who train and support Black Belts, while Black Belts manage projects and drive teams to deliver results through the Six Sigma process. Green Belts support Black Belt teams.