Mapping mission-level availability requirements to system architectures and policy abstractions

The BBN Pledge project was a DARPA-sponsored research effort to provide a common architecture for policy in information systems. To support technology transfer activity within Pledge, BBN surveyed underdeveloped topics in the area of information security policy. Based on that survey, BBN selected the topic of availability requirements for further work. We discuss mission-level availability requirements and suggest techniques for mapping such requirements to unifying abstractions and system architectures. Rather than providing a finished product, this paper is intended to present initial ideas that can be the basis for further research.