Is There a Lack of Standards for Robustness and Assessment?

I don't think there's a lack of norms and standards that pertain to robustness and assessment. I've actually published a block article about two years ago, which I updated just recently that lists all the international standards. So we have ISO 26262 for system wide, safety of all automotive systems, including software and hardware. And that norm, for instance, clearly describes safety targets. But again, the in order to get to a safe system, the number is so small that it's actually not possible to to show just through driving or through a safety assessment that you've reached the safety goal.