Unfortunately, we are human... Yes, the toyota case is a well publicised case. Consider though, the number of safety critical systems that are out there perfo

Unfortunately, we are human... Yes, the toyota case is a well publicised case. Consider though, the number of safety critical systems that are out there performing perfectly everyday. Of course, that is not proof of much, but the fact that you can name the Toyota case (and probably the Therac 25 case) means that the process generally works.