In my business I work on a system that if it's gone wrong once, it can happen again however unlikely so you try to mitigate it by putting a system in to not let it happen again
Absolutely, pretty standard practice in any Quality Management approach, especially Lean Manufacturing.
Normally, the way it works is that when something goes wrong a "Kaizen Event" is declared, and a Root-Cause Analysis is done (We call it "Asking the 5 'Whys'?") to get to the bottom of how the problem occurred and what events led up to it happening.
Then you redesign the process to ensure it can't happen again, retrain everyone involved to make sure they don't repeat the behaviour pattern that led to the failure, and off you go. Process engineering done properly.
