Rahmat Islamiyah Private High School Medan is a high school that always has a vision and mission that is oriented towards graduates who are smart, excel in achievement, broad-minded and realize international standard assessment ratings. assessment, quality assurance in order to make schools competitive, qualified and accomplished. Problems faced by S SMA Rahmat Islamiyah Private Medan there is no application system in determining students who excel and teachers have difficulty in determining students who excel. In addition, the data at the Rahmat Islamiyah Private High School Medan, especially the assessment data about students and other data at this school are mostly still written manually, so the data is still vulnerable to loss. By designing a decision support system is very appropriate to overcome the problems at hand. A decision support system (Decision Support System) is a computer-based system that is interactive in shaping decision makers by utilizing data and models to solve unstructured problems. A decision support system is implemented in conducting evaluations of outstanding students