[SI-LIST] Design Guide or Analysis?

I'm looking for anecdotal information regarding what percentage of new 
projects implement rules from a design guide and how many generate new 
rules based on first principles analysis and simulation.  You can comment 
on your own shop (if you feel so inclined) or give your impression of the 
state of the industry in general.  Please distinguish between the two.
Since I work for a services group, most all of our projects involve 
analysis and rule development since folks can read a design guide 
themselves for a lot less money!  Naturally we have a library of 
interfaces we've used dozens of times, and we use our collective history 
for these nets.

My impression is that component vendors are becoming the "new" center of 
SI knowledge, and their customers are looking to them more and more for 
design guidance.  Maybe this trend has been going on for some time and I'm 
just figuring it out now.  If my observation is correct, this represents a 
fundamental shift away from system houses driving the performance 
envelope.

Greg Edlund
Senior Engineer
Signal Integrity
IBM Global Engineering Solutions
3605 Hwy. 52 N, Dept. HDC
Rochester, MN 55901
gedlund@xxxxxxxxxx


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