ORBEL is the Belgian Society for the promotion of operational research and analytics. Its goal is to contribute to the science, the development, and the adoption of advanced tools, methods, and knowledge in these fields, by stimulating multidisciplinary research and scientific collaboration among its members, as well as fostering cooperation between academia, industry, and society in general, both on the national and the international level. Its main fields of interest include optimization, simulation, data science, and other quantitative methods for effective decision making in complex environments.  ORBEL is a member of EURO, the Association of European Operational Research Societies, and IFORS, the International Federation of Operational Research Societies.