  Cyber Physical Systems (CPS) enable new kinds of applications as well as
significant improvements of existing ones in numerous different application
domains. A major trait of upcoming CPS is an increasing degree of automation up
to the point of autonomy, as there is a huge potential for economic success as
well as for ecologic and societal improvements. However, to unlock the full
potential of such (cooperative and automated) CPS, we first need to overcome
several significant engineering challenges, where safety assurance is a
particularly important one. Unfortunately, established safety assurance methods
and standards do not live up to this task, as they have been designed with
closed and less complex systems in mind. This paper structures safety assurance
challenges of cooperative automated CPS, provides an overview on our vision of
dynamic risk management and describes already existing building blocks.
