This white paper explains how oil, petrochemical, and chemical facilities have complex systems with many potential points of failure, even the smallest of which can increase cost and risk if left untended. In order to identify and improve weak points in a system, a methodology must be applied in a consistent manner. Six Sigma, DMAIC, is a data-driven improvement cycle that achieve measurable, reproducible results. By applying Six Sigma principles, areas of cost and risk can be identified and rectified.