In the emergency area of a medical center, the project, using the DMAIC (Define, Measure, Analyze, Improve, Control) methodology, focuses on reducing patient waiting times. Simulation using the ARENA software was the validation methodology chosen to evaluate the impact of the proposed changes. As a result, a significant reduction was obtained in the Average Waiting Time (AWT) for patients, from the moment they arrive at the health facility until they are seen by the corresponding doctor.