I suppose this was just an example of when you want to do safety-critical control in software. For something as simple, hardware measures are probably more appr

I suppose this was just an example of when you want to do safety-critical control in software. For something as simple, hardware measures are probably more appropriate, but your particular problem may be far too complex to solve with simple hardware-based logic. For example, consider a system in a radiation therapy machine which ensures the patient does not receive too much dose or at the wrong spots.