ABSTRACT
When developing new safety related systems, especially in automotive industry, there is the need to verify that the safety of the new system is not worse than the safety of the old system. So, even if the reliability is worse, what has to be expected when new functions are implemented with new components, the safety can be equal or even better. Furthermore, it is possible, to charge the worse reliability against improved safety due to additional functions. But how can systems with nearly the same functions but very different structures, like for example a conventional braking system and a brake-by-wire-system, be compared against each other?
