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 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu