My forum assistant is not searching for some reason. It just gives me a return that says the topic I am interested in is not being dicussed today. So here's the discussion. I have been using Wintotal for several years and I rank the comps the way Wintotal does when the sort comps radio button in the comps power window is pressed. I have been using the cavalier thinking that if I have chosen the correct comps and inserted the correct adjustments that the machine should tell me which comp is most like the subject and what the value is. Now, I have followed the discussion on here about those instruments of the devil, the rapidly becoming ubiquitous AVM, but it became necessary the other day for me to consult USPAP on the issue of AVM. I looked at AO 18. I'll be glad to look elsewhere, but that one seems to address the USPAP pitfalls of AVM-ing. Seems in nutshell we should: 1. Understand how the AVM works. 2. Use it properly. 3. Determine if the AVM and the data it uses are appropriate for the intended use. 4. Be able to determine whether the output is credible. 5. Determine if the output is reliable. If sorting cmps and value of the subject in Wintotal is an AVM, I am failing USPAP-again. DISCLAIMER: This post in no way is intended as criticism of Wintotal . A while back (like several years) I asked the tech guy on the Wintotal 800# how does this thing work. The answer given very hesitently and criptically only after checking with a senior tech is "Its a wieghted average". "Oh, I see, thankyou", I said. I got the impression its a secret, but I accepted the answer without further question. Now I have gone along about two years with the assurance that I am using a wieghted average and after all if it wasn't OK why would Wintotal use it? Now I have also been whipped into appraiser submission to never ever use the word "average" for some reason (everybody else in the world does), so I thank my lucky stars nobody has asked me why my comps were ranked the way they were in the URAR. I just wouldn't be able to honestly say anything other than the computer did it and its a weighted average. But I have no real idea or information how it did it. Now with my extremely limited newbie background in regression analysis, I'm discovering that "average" sort of sneaks in there too. This average, but don't admit it is driving me into crime. Two questions: 1. How does Wintotal adjusted comp sorting and subject value conclusion work? (I know its a weighted average, but how does it work- what the heck is weighted?) 2. Do you think using Wintotal to rank the comps is using an AVM? Thanks in advance for answering the questions, and if you answered to the best of your ability go ahead and tell me what you think.