There is a simple but undeniable element of genius to the idea of, instrumenting the number of validations triggered. I would hazard a guess that 90+% of teams would focus on an "order success rate" type of metric and call it a day, instead of a "# of times bad data was handled" metric, which is exactly how you escape this trap of good work going unnoticed.

Thanks for sharing! Shamelessly stealing and applying this concept at work next week!