System resilience

In theory, if I build a perfect system, it saves my life. I don’t need to debug or improve it anymore. However, the perfect system doesn’t exist, thus I rather focus on its resilience. Mind that resilience is not equal to toughness. A tough system can hold some brute usage or attack, but once it brakes, it freezes. On the other hand, a resilience system can self-fix and recover from damages. It doesn’t need to be perfect, but instead it must be able to recognize and solve the error. In particle, I try to make my system resilience so that I can save more time on future maintenance.