Six Sigma is both a state of performance and a methodology. It is a state of performance because Six Sigma processes yield average performance that is six standard deviations (sigma) from customer specifications/ requirements.

It is also a methodology because its known frameworks (DMAIC & DMADV) provide a platform by which to redesign and design processes with a Six Sigma state of performance, respectively:

DMAIC: Define-Measure-Analyze-Improve-Control is used to redesign existing processes using tools such as Voice of the Customer, Baseline and Statistical Analysis as well as sustainability platforms and reports to maintain the gains/successes from the project.

DMADV: Define-Measure-Analyze-Design-Validate are used to design processes for six sigma state of performance prior to production. This is a proactive form of integrating six sigma, and is used mostly by organizations that have mastered the DMAIC process improvement methodology.

Download the “Lean Six Sigma” document.