Six Sigma is a set of tools and techniques used for improving processes. It was first introduced for Motorola by engineers- Mikel J Harry and Bill Smith. Today, it has evolved as an independent discipline of its own. It seeks to enhance the output quality of a process by recognizing and eliminating the defect causing agents and minimizing variability in business and manufacturing processes. Thus, Six Sigma Green Belts are professionals who work on the process improvement teams of a company to generate near-perfect services and products.