Six Sigma (1) a data-driven method for improving business and quality performance, has been published as a two-part ISO standard. Six Sigma was originally developed by Motorola in 1986 to ameliorate manufacturing processes with the goal of 99.99966% (2) of products free of defects (i.e., 3.4 errors per million). Today, the methodology is applied in many sectors of activity by organizations large and small for all types of process