Working with vACDM
The plugin vACDM is designed to use it without diving deep into the ACDM procedure. It can be used if the controller is aware of the basic procedures. Next to that, the pilot does not need to be aware of the topic at all, it will work with all kind of pilots.
When using vACDM, the enroute and startup clearance should be issued seperately. Enroute clearance can be issued whenever the pilot requests it. Startup should only be approved when the pilot is able to push and/or start the engines within the next 5 minutes.
vACDM works best when the TOBT up to date and the pilot is completely ready at that time. The filed EOBT is always a good first guess. If there is no valid time available (empty TOBT, time in the past or to far in the future), ATC should ask the pilot if he has a time where he is fully ready for pushback. That time should be entered as TOBT.