Six Sigma is a systematic methodology to reduce errors of proactive form, concentrating itself in the improvement of the processes but that reacting correcting happened failures once. it is nourished of proven principles of quality as it is. The University Libraries, for a short time have begun to incorporate systems of management of quality. Reason why also, they have established measurements by means of Indicators, Control panels and other tools of apply measurement and evaluation to the documentary processes. Six Sigma is a management philosophy, that deserves to be proven in Libraries of Superior Education which already they have incorporated the concept of Quality to his management.