Six Sigma - "Achieve Error-proof Work Systems”.

Six Sigma means 3 defects in 1 million opportunities. i.e., If GE produces 1 million light bulbs, for that process to be operating at 6s, only 3 light bulbs could be defective. Companies striving to achieve 6s within their processes utilize various statistical techniques to error-proof their work systems.

6s methodology is used by LeanQA to reduce variation in a process to the extent that the process becomes robust and repetitively reliable.