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We had dozens of new buildings being constructed (at the building plan stage), a little hard to do surveys. Users expected wireless the day they moved in. We later did predictive surveys on some of these sites and found that an experienced person could do them manually faster by looking at the building design. Most software (some from some large companies) don't even important autocad files or even look for lines on images; some poor person has to redraw all the walls, windows etc. Very time consuming to get pretty color pictures. Impressive for the a report but deep down, it's not truly predictive or efficient unless it can understand and autocad file and make intelligent decision based what it sees.

martell,
Now that is the truth. Thanks for the straight forward analysis. It really helps to know building construction and the dynamics of all the other materials, the people population , and surrounding RF signatures have on the WLAN you are implementing. You have to develop that "RF Sixth Sense" as Jim Geier http://www.wireless-nets.com, calls it.