In Reply to: flights in concrete posted by Roo_Ted on Friday, 22. April 2011 at 14:30 Bali Time:
It also doesn't take into account the possibility of a plane crash or an airline going out of business or the number of passengers on each plane or the number of immigration staff that might be off sick or attending a village ceremony, in fact it only deals with data that it is aware of at the time! But it does give people an idea of what may ne encountered.