Here you will find the answers to frequently asked questions regarding Airport Collaborative Decision Making.

  • What does Airport-CDM stand for?

    Airport CDM stands for Airport Collaborative Decision Making.
    For more information on the process, click here.

  • What does the Airport CDM process aim to achieve?

    Airport CDM is a concept for improving operational efficiency at airports. Its objective is a comprehensive exchange of information between all parties involved and thus an efficient coordination of all processes in connection with aircraft turnround. Airport CDM is designed to help optimally use available capacities and operational resources, cut costs, increase punctuality, and reduce fuel consumption and emissions on the runway by minimising waiting times. Automatic communication with the NMOC leads to optimum CTOT allocation.

    For more information, click here.

  • Who is involved in the Airport CDM process?

    The process is obligatory for all flights operated in accordance with instrument flight rules (IFR). All ground handling partners are involved.

  • Which penalties will be incurred for non-participation in the Airport CDM?

    If the turnround process is not in accordance with the Airport CDM process, this can have an adverse effect on the individual flight concerned. As a result, start-up clearance will not be given and delays may occur. Alerts will be transmitted notifying users and ground handling service providers of any disruptions or irregularities.

  • What role does Eurocontrol play in the Airport CDM process?

    The European launch of Airport CDM is a Eurocontrol initiative.

  • How will the implementation of Airport CDM affect ground handling services?

    Changes to the ground handling process which may affect the ground handling time must be reported in the TOBT. The TSAT can be used to optimise resource planning (e.g. tow tractor disposal).

  • How does the implementation of Airport CDM affect the airlines?

    Someone responsible for TOBT and a recipient for the Airport CDM alerts must be designated. The start-up request must be in line with the TSAT. Automatic communication with the NMOC leads to optimum CTOT (Calculated Take-Off Time) allocation.

  • How does the implementation of Airport CDM affect air traffic control?

    Start-up clearance is given by air traffic control in line with the TSAT.

  • When will Airport CDM be initiated at Berlin-Schönefeld Airport?

    The process will be initiated at Berlin-Schönefeld Airport on 27 March 2014. On establishing automatic data exchange with the NMOC on 1 May 2014, SXF will be classed as a fully implemented Airport CDM airport.

  • Why is Airport CDM being initiated at Berlin-Schönefeld Airport?

    Airport CDM will be an integral part of BER Airport. The IT infrastructure required to perform operations in accordance with Airport CDM has already been obtained and installed. The introduction of operational procedures in accordance with Airport CDM and based on the existing IT infrastructure already enables SXF to benefit from process-related optimisations.

  • What does TOBT stand for and how important is this timestamp?

    TOBT stands for Target Off-Block Time. This time indicates when the aircraft is expected to be ready and refers to the time the ground handling process (excl. pushback and de-icing) will be completed and the aircraft would like to leave its parking position. The TOBT is managed by those responsible for TOBT and, if necessary, amended in the event of changes to the ground handling process. Based on the TOBT, a pre-departure sequence is generated which determines and communicates the TSAT for each flight.
    For more information, click here.

  • How and where do I enter the TOBT?

    The TOBT (Target Off-Block Time) can be entered and managed via the Airport Operational Extranet (AOE). The system is made available free of charge to those responsible for TOBT within the scope of the Airport CDM process.
    We recommend that the TOBT be entered by the relevant ground handling service provider, who has direct access to the airport’s central database (Airport Operational Database – AODB).
    For more information on entering the TOBT, please click here.

  • How do I access the AOE (Airport Operational Extranet)?

    In order to access the AOE (Airport Operational Extranet), please complete and return the User Agreement.
    More information and the User Agreement can be found here.

  • What does TSAT stand for and how important is this timestamp?

    TSAT stands for Target Start-Up Approval Time. This indicates the time the pilot can expect to receive start-up clearance from air traffic control in line with the generated sequence. When calculating the TSAT, both the local capacity (runway) and the available network capacity (sector – CTOT) are taken into account.

  • How do I find out the TSAT?

    The TSAT (Target Start-Up Approval Time) is communicated via defined channels. As a rule, the relevant ramp agent informs the flight crew of the current TSAT. DCL (Datalink Departure Clearance) can also be used.

  • How can I obtain more information?

    Please feel free to contact us should you have any questions or suggestions.
    More information on Airport CDM can be found here: