What is Six Sigma?

Six Sigma is a set of management tools and techniques implemented with the ultimate goal of reducing or eliminating defects.  A six sigma level of performance is 3.4 DPMO (defects per million opportunities), or a 99.99966% success rate.  The framework for implementation follows the DMAIC approach: Define, Measure, Analyze, Improve, and Control.  The focus on improvement of processes and products is not only to reduce the possibility of risk or defects, but to make defects virtually impossible using various controls or built-in functionality.