This session, specifically designed for municipal personnel, delves into the decision-making processes within various units of a municipality, with a special emphasis on relevant case studies and the extensive use of data and information technologies. We aim to demystify "data-driven management" and "big data", addressing the challenges in implementing data-driven decision-making within different municipal units. Using straightforward models, we will shed light on common issues, categorize the types of decisions that guide the progress of these units, and demonstrate how technology can assist in each scenario. The session's goal is to equip attendees with an understanding of the opportunities and potential managerial complications that can arise from a technology-oriented, methodical approach to decision-making, thereby enhancing the effectiveness of data-driven public administration.