What's the point of this?

Roy Smith wrote:

In article , wrote:
The FAA and the airlines are having a lot of problems getting those
RNAV SIDs (aka: ATC DPs) to work smoothly.

What does it mean for a SID not to work smoothly?

They have had a whole lot of problems, particularly at PHX and LAS. The
various aircraft have RNAV avionics that handle the critical waypoints
and tracks differently. Also, even the positions are different for air
carrier aircraft with GPS and the older "glass cockpit" airliners that
use DME/DME updating.

There were periods where the FAA suspended use of the procedures because
of controller complaints. That, in turn, resulted in the airlines
whining to no end.

It got so bad the FAA belatedly issued an air traffic bulletin to
controllers covering the subject to some extent:

http://www.faa.gov/atpubs/atbarc/03-5.htm