===== Six Sigma (6Sigma)=====
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**Six Sigma** is a quality-control methodology developed in 1986 by Motorola, Inc. The method uses a data-driven review to limit mistakes or defects in and process. ... Six Sigma points to the fact that, mathematically, it would take a six-standard-deviation event from the mean for an error to happen.

Source: [[https://www.investopedia.com/terms/s/six-sigma.asp]]