Airport CDM Generic Processes are recommended or highly recommended for implementation of the Milestones Approach concept element, as described in the Implementation Manual. It describes Milestones events, as well as actions when some Milestones do not occur at the predicted moment. The described processes are automated and the objective is to inform Airport CDM partners of inconsistencies of provided information as well as updated predictions of target off block, start up approval and take-off times.

The Milestone Processes are also linked to the Departure Planning Information (DPI) messages that will supply the CFMU with reliable data concerning the progress of the flight.

The outputs of the Milestone processes are alert messages to airport partners and DPI messages to CFMU. Whereas the milestones mark a special event, the process may also be activated when this event does not occur at the predicted time.