...but the whole thing break down as soon as distinct teams are taking care of catering and checking the venues floor's mechanical load specs, so using this indicator only makes sense as long as the venues (and the teams working in them) are sufficiently small.
Nowadays the "big shows" employ teams of dozens of guys travelling and dozens of helpers employed locally, it would be severely negligent if checking of basic requirements would only be done only on the basis if the catering guys met the random demand for colour-sorted sweets.
Even in those organizations, there will be controlling and Q&A. Orgs being sloppy in one regard are often sloppy in another and probably gave down bad orders in the one direction _and in the other, too_.
I organize smaller events, but you wouldn't believe the number of f-ups a bad manager can produce left and right. Often, the "ground crew" isn't even at fault - e.g. I had events where the ground crew was briefed to a standard timetable layout, although we had provided a timetable usable for them beforehand, having them fix a lot of things on the fly.
Nowadays the "big shows" employ teams of dozens of guys travelling and dozens of helpers employed locally, it would be severely negligent if checking of basic requirements would only be done only on the basis if the catering guys met the random demand for colour-sorted sweets.