> and their failure modes are understood in relation to each other. This is super important and why the other poster really doesn't know what they're talking a

> and their failure modes are understood in relation to each other. This is super important and why the other poster really doesn't know what they're talking about. These things are most definitely tracked, anyone who thinks otherwise is encouraged to do a search for MTBF, MTTR, etc. Even the most simple manufacturing plant will track these and do things like keep parts on hand or not based upon them.