Six Sigma is a registered trademark of Motorola that aims to eliminate defects. It was developed in the 1980s at Motorola to reduce production defects and has since been used to improve business processes. Six Sigma defines different levels of practitioners from yellow belt to master black belt and uses methodologies like DMAIC (Define, Measure, Analyze, Improve, Control) and DMADV (Define, Measure, Analyze, Design, Verify) to drive process improvement and innovation. When properly implemented, Six Sigma aims for no more than 3.4 defects per million opportunities.