acp-IT provides state-of-the-art software applications for advanced forecasting, planning and optimization in complex business domains. Our GORDIO Airports solution offers operative highly accurate Passenger Flow Forecasting, supporting in proactive instead of reactive management of resources associated with passenger flow. Identifying potential problems and applying proactive management IROP (IRregular OPerations) may be avoided or if unavoidable, lessen the negative impact of an IROP