Six Sigma is the evolution of statistical quality improvement processes that have been used extensively to improve manufacturing and other process-related industries. How good is Six Sigma? It is a statistical measure of variability or standard deviation. The Six Sigma process calculates to 3.4 defects per million opportunities. Needless to say, that is near perfect execution of a process. Although not often used in the safety arena to full potential, Six Sigma tools can help produce significant and sustainable improvements in safety performance, injury reduction and associated pain.