* Six Sigma, or 6 Sigma, is a trademarked measurement methodology devloped by Motorola between 1984-1986 for reducing manufacturing defects and improving quality control in a variety of industries. Six Sigma can apply to anything from manufacturing to banking to insurance.
* Six Sigma methodology comes in the two forms of DMAIC and DMADV. DMAIC stands for Define, Measure, Analyze, Improve and Control, which is for business processes. DMADV stands for Define, Measure, Analyze, Design, and Verify, which applies to product and process designs. There is also a hierarchical structure designed for Six Sigma, which includes the roles (from top to bottom) Executive Leadership, Champions, Master Black Belts, Black Belts, and Green Belts.