Any change of more than 15 minutes to the estimated off-block time (EOBT) of a filed flight plan has to be communicated to the EUROCONTROL Network Manager’s integrated flight plan filing system (IFPS). At collaborative decision-making (A-CDM) airports, the target off-block time (TOBT) values reflect any delays that can be attributed to the aircraft operator (AO) or to the ground handling operations.
EUROCONTROL as Network Manager is informed about the TOBT values via departure planning information (DPI) messages, disseminates and highlights these values to stakeholders, to ensure that they can be easily identified and solved. Aircraft operators have to react to a discrepancy by filing a delay (DLA) message based on the TOBT value.