The aim of this article is to discuss on Six Sigma. Six Sigma at a lot of institutes simply means a way of measuring quality that strives for near perfection. Six Sigma can be a disciplined, data-driven approach as well as methodology for eliminating defects in different process – from manufacturing to transactional as well as from product to be able to service. Six Sigma tries to improve the quality of process outputs simply by identifying and removing what may cause defects and minimizing variability in creation and business operations. It uses a few quality management methods, mainly empirical, record methods, and creates its own infrastructure of people inside organization who are generally experts in most of these methods.