Belts and Suspenders?
For so many years we have been trained (brainwashed) to believe more redundancy = more safety. While for some situations it’s true. Increase your level of redundancy your system will get better safety performance. However, if you do it WRONG, it’s a proven fact (not just me spouting off) your safety performance will degrade.
This week I ran into a very smart person, who just happened to say the dumbest thing all day. “We needed safety, so we made the thing redundant”.
My dad used to say to me “It’s like polishing the brass when the ships sinking”. If your going to do something, make sure its really worthwhile, otherwise you just wasting your time.