I can't see it working, Ops/Dispatch departments need to prepare CFP's (Computerised Flight Plans) well in advance of crew report and passenger check-in, in my previous lives we entered the data for the CFP's perhaps the day before and programmed each CFP to be released at an appropriate time for the most recent weather update.
Recalling one IT operator in particular we worked on nominal weights, we guesstimated an equal number of males to females and then a percentage of kids, when a crew reports for duty they are presented with the CFP and pretty much the first question the Captain is asked is how much fuel he/she wants and the aircraft gets fuelled using the nominal weights, if it was necessary to wait until check-in closes and the check-in staff do their sums before a CFP can be produced for the Captain to then decide upon a fuel figure before a bowser is called, by which point the fire service shall also be required for refuelling with passengers on board, well ...
Who dreams this stuff up?
