From: utzoo!decvax!cca!PS@MIT-MC@sri-unix
Newsgroups: net.aviation
Title: On-ground holds for ATC
Article-I.D.: sri-unix.2636
Posted: Wed Aug 11 18:13:59 1982
Received: Sat Aug 14 03:41:48 1982

From: Peter E. Seissler 
The antique ATC computers (read abacus) can only predict loads so well.  I 
suspect that as departure time come near, they reevaluate the load on the route
(particularly for short runs), and reissue release times.  I've had some delays
since the strike, but not always .  Perhaps you've just been unlucky.

Remember, controller workload can also vary with personell numbers (i.e. sector
cosolidation).  The airlines can't change the schedule on short notice (people
have made reservations), so they must play it by ear.  

					Pete