https://github.com/lorin/resilience-engineering
You can think of robustness as being able to deal well with known unknowns, and resilience as being able to deal well with unknown unknowns.
https://en.wikipedia.org/wiki/Resilience_engineering
https://en.wikipedia.org/wiki/Safety_engineering
https://en.wikipedia.org/wiki/MTTFd
https://www.resilience-engineering-association.org/