Rescue 3
Sorry, I did not fully understand your query the first time around. Yes you are absolutly right, it all comes down to wild guessing. If the route via sector A is giving e.g. 180 min delay, we will just try a rerouting via sector B. 0 min delay, everybody is happy. 240 min delay and the s..... hits the fan? Not really. We will try sector C, if that dont work sector D, and if it comes down to all options expended, back to option A with a call to ETFMS, explaining the situation, and back to square one. The operator takes the delay and no complaints.
Hoppefully after we migrate from Unix to Windows and most CFMU applications will be integrated into a single CHMI, we (might) will be able to run scenarios on a flight per flight basis. Don't wait up for it. The future is comming but it's taking it's time to get here.
Cheers