While getting caught up on my blog reading, I saw that Avinash Kaushik noted that the fourth version of the standards document of the Web Analytics Association was now available. It was fun to read the document and see how it's evolved, since I was there when it was born.
Three years ago, Jason Burby and I were appointed Co-Chairs of the Standards Committee, given a blank sheet of paper, and told, "Go figure it out." One of my hot buttons was to infuse the standards with a framework, so that it wasn't just a list of definitions, but also a way of looking at the problem. That way, if a company felt they needed a metric that wasn't listed, there was a framework they could use to create their own. Jason and I wrote that there were three types of web analytics metrics: counts, ratios, and key performance indicators (KPIs). We also noted that a metric can apply to three different universes: aggregate (total site traffic), segmented (a subset of site traffic), and individual (a single site visitor).
Jason and I sent the initial document around, and then the fireworks began. I remember civil but heated discussions with folks such as Eric Peterson about the difference between counts and KPIs; weren't we over complicating things; etc., but Jason and I held our ground. With that battle won, the Standards Committee started defining terms, a slow and arduous process. I then had to step down as Co-Chair when I joined Burton Group in February 2006. (To ensure analyst impartiality, Burton Group won't let its analysts serve on standards making committees).
So it was with some trepidation that I opened the latest version of the standards document, worried that the framework contribution was no longer there. Happily, the framework wording remains, but with the addition of a metric type called "dimension." Also happily, the terms have evolved quite a bit. Here's the November 2005 definition of "Unique Visitors" and the August 2007 definition: