The KPI thing doesn't sit right with me. They are a means of justifying a position and can be manipulated. As a measure of success I think they are dubious. They only measure one thing and systems are much more complicated than that. I think they are a crutch that is leaned upon when insight and decision making is weak.
If you owned an airline and your primary goal was to pass it on to your grandson, would you need KPI's to tell you if the safety systems were getting better or worse?
Good idea about getting the OP to convince us though, I like that.