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What is Airport Collaborative Decision-Making (A-CDM)?

June 1, 2024

Airport Collaborative Decision-Making (A-CDM) aims to improve the efficiency and resilience of airport operations by optimizing the use of resources and improving the predictability of air traffic. It achieves this by encouraging the airport partners (airport operators, aircraft operators, ground handlers and ATC) and the Network Manager to work more transparently and collaboratively, exchanging relevant accurate and timely information. It focuses especially on aircraft turn-round and pre-departure processes.

A-CDM also allows the exchange of more accurate departure information, particularly target take-off times, with the European ATFCM network, leading to improved en-route and sectoral planning.

Who Benefits from Airport Collaborative Decision-Making (A-CDM)?

All Airport Partners benefit from A-CDM:

  • Aircraft Operators (AO): Better adherence to schedule, possibility to express preferences
  • Ground Handlers (GH): Improved predictability of turn-round operations, better use of resources
  • Airport Operator: Increased departure and arrival punctuality, more efficient use of stands, gates and terminals
  • Air Traffic Control (ATC): Optimised use of airport airside infrastructure, reduced ground congestion
  • Central Flow Management Unit (CMFU): Better adherence to slot, optimised use of airspace capacity

Which Airports have A-CDM?

A-CDM Terminology

A-CDM defines a wide range of terms, including the following which are illustrated in the image below:

A-CDM Terminology Overview
A-CDM Terminology Overview

Off Block Time (OBT):

In Block Time (IBT):

Take Off Time (TOT):

Landing Time (LDT):

Taxi-In Time:

Taxi-Out Time:

Turnaround Time (TAT):

Illustration of Turnaround Time (TAT)
Illustration of Turnaround Time (TAT)

Further Reference:

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