What is SIX SIGMA?

Six sigma just a measurement scale upon which improvement / performance can be gauged or overall methodology that provides standardized problem-solving tools improvement. To achieve six sigma quality process (1.5 sigma shifted), process shall provide 3.4ppm or lesser. source: http://www.sixsigmais.com

Sig Sigma is to reduce variations, it is a data driven structured process to drive out defects and improve the sigma level of products and services that we called breakthrough strategy.Six Sigma use DEMAIC principles; D-efine M-easure A-nalize I-mprove C-ontrol