This research develops a quality management system and its procedures that contribute to the improvement of organizational performance at the Isla de la Juventud Electric Company. Methods, techniques, and instruments were used, both theoretical, empirical, and statistical. The main results were the application of the diagnosis that made it possible to verify the feasibility and effectiveness of its use as a methodological instrument, since it was verified: the regularities that in general are in the order of problems with the delivery of the information until the fluctuation of the personnel, these being the process managers. The quality management system is a methodology applied by the working group that contributes to the improvement of organizational performance and has an impact on the increase of the results seen from the development of activities by the key processes for the fulfillment of work objectives which provide compliance with the fundamental processes. The implementation of the Quality Management System from its procedures and manual resulted in the collection of information and ideas for decision making, feedback is established on the results of audits, supervision, and other control actions, which allowed to improve performance, adjust and improvement actions.