A pet peeve of mine: A report about associations (e.g., marketing benchmarks report) where the report defines associations by the number of members, but fails to discriminate between trade associations and individual associations. In other words, the report will talk about "associations with fewer than 500 members" as if a trade association with 450 members is somehow the same as an individual membership organization with 450 members.

I have worked with trade associations with fewer than three dozen members that had a budget and staff three times the size of a professional society with 2,500 members. I think you see my point; the number of members without context makes for pretty useless comparisons or benchmarks.

Just something to keep in mind if you're ever creating or reading benchmarking reports.