This document provides an overview of Six Sigma, including: - It began in 1987 when Motorola published its Six Sigma quality program developed by Mikel J. Harry. - Hundreds of companies around the world have adopted Six Sigma as a way of doing business. - Six Sigma aims to achieve a process performance with 3.4 or fewer defects per million opportunities. - It can be applied to any process that produces an output, whether a manufactured product or a service, to help meet customer requirements.