Six Sigma Belt Level Rankings Professionals who earn Six Sigma certification become key stakeholders in improving the quality of operations within their organizations. They strive to eliminate variation in manufacturing and business operations by implementing standard processes and establishing metrics that minimize the potential for defects. Many of today’s leading organizations synthesize Six Sigma standardization practices with Lean manufacturing methods that cut waste to make their organizations as efficient as possible. Some of the companies that have successfully put Lean Six Sigma (LSS) principles into action include 3M, Xerox, and BAE Systems. For businesses to achieve optimal results with these initiatives, experts trained in the applicable tools and techniques must guide enterprise-wide changes. But what do Six Sigma belt levels mean? These certifications indicate the roles that individuals are qualified to play in completing projects and promoting quality ma