A data-driven methodology for eliminating defects and reducing variability in business processes, aiming for near-perfect quality with no more than 3.4 defects per million opportunities. It uses statistical tools and structured problem-solving approaches to achieve measurable improvements.
From the Greek letter sigma (σ), representing standard deviation in statistics. 'Six sigma' indicates six standard deviations from the mean, representing 99.9997% accuracy. Motorola developed this methodology in 1986, with the name emphasizing the statistical rigor behind the quality improvement approach.
Six Sigma is like having a detective squad armed with statistics - they don't just fix problems, they hunt down the root causes with mathematical precision and prevent them from ever happening again. The 'black belt' and 'master black belt' titles aren't just corporate theater; they represent serious statistical expertise that can save millions by eliminating tiny but expensive variations!
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