Effective change management is a systematic, structured and evaluable management model that seeks to design, develop, implement and finally evaluate a change policy in an organization. The change in an organization must be understood strategically, as a policy aimed at meeting goals in relation to an environment -in fact, the change seeks above all to adapt adequately to the organizational environment- and therefore must affect the entire organization as a whole and individually for each department and person. The diagnosis of the organization is the previous step in the process. For the change to be effective, the key is its final evaluation and for this it is necessary that the programs for the change are developed in a systematic and concrete way, so that they can be established at the post the necessary indicators for its control and evaluation. The corrective and reward measures, after the control process, are also fundamental so that the change is finally effective and real.