Hey snake-in-the-grass.
Yoy'd think it was like that. However ACSA have the final say. (i'm sure all users and affected parties are consulted)
RWY 03R used to close on a Sat at about 2, now its 1630, soon it will have to be 1830. The thing is they need a certain amount of time to do their thing.
With all the other scheduled closures on the other days it only leaves Saturday night.
As this is notamed and has been ongoing for a while (and not being an expert) why do the charters do extra charters on a Saturday afternoon. Sure the client in the end dictates but then should also be made aware of the risk (arrival slot availabilty etc)
Oddly enough the calculator man kills his own story by admitting they missed their slot anyway (not that making it would've guarenteed no hold)
WB was also mentioned - surely this is a similar point, too many operator's (charter or training) for the airport. New operator sets up anyway knowing about the congestion and then complains about the service.
Oh well that's capitalism i guess.
Cheers