The word sigma, is a statistical term that measures how far a given process deviates from perfection. The central idea behind Six Sigma is that if you can measure how many "defects" you have in a process, you can systematically figure out how to eliminate them and get as close to "zero defects" as possible. To achieve this a process must produce no more than 3.4 defects per million opportunities, according to their data.

Key Concepts of Six Sigma (At its core, Six Sigma revolves around a few key concepts). What do you think?