Flight centric tactical assessment Already developed at the strategic level, time windows are assessed in the tactical phase also from a flight performance point of view, i.e., fuel consumption and arrival flight delay. We consider a time horizon from a few hours before flight departure up to 20 minutes before arrival, when the horizon of the Arrival Manager process begins. The input of this assessment are the time windows and routes obtained at the strategic level. Here, uncertainties that at the strategic level are difficult to capture, such as weather forecast errors for the day of the operation [...]