Note especially the following points:
· Spare capacity, which ensures that there is a back-up or alternative available when a vital component of a system fails.
· Flexibility, the ability to change, evolve, and adapt in the face of disaster.
· Limited or "safe" failure, which prevents failures from rippling across systems.
· Rapid rebound, the capacity to re-establish function and avoid long-term disruptions.
. Constant learning, with robust feedback loops that sense and allow new solutions as conditions change.