DMAN is a planning system to improve departure flows at an airport by calculating the TTOT and TSAT for each flight, taking multiple constraints and preferences into account.

Departure Management is the concept for an integrated DMAN, or pre-departure sequencer, in Airport CDM for flight progress monitoring and A-SMGCS for surface traffic situation monitoring.

For runway sequencing the concept of DMAN in combination with AMAN and A-SMGCS implementation, can be considered a key enabler in network planning optimisation by CFMU. For each airport it can be decided locally what traffic resource forms the bottleneck to optimise on: apron, gates, taxiways, or runways. Off-Blocks sequencing is often needed in order to regulate traffic flows on large airports, with complex aprons, taxiways, or bottleneck at the runway or stands. With this sequencing function the TSAT can be calculated, and hence the TTOT at the runway. The sequence prediction automates this process and provides early TSAT and TTOT transparency towards all partners.