Model-based development of systems-of-systems with reliability requirements

The development of Systems-of-Systems (SoS) architectures is challenged by the inherent characteristics of SoS such as operational independence, heterogeneity of constituent systems, emergent behavior and large-scale distribution. At present, the resulting complexity restricts the design space exploration of SoS architectures to be focused on cost and functionality. In this paper we extend our previous work on timing analysis and optimization in early SoS design phases by supporting reliability requirements in the generated SoS architecture. Our approach defines a SoS architecture development methodology that applies an architecture optimization method based on concise modeling with architecture patterns, timing and reliability requirements, and extensions to the Unified Profile for DoDAF and MODAF (UPDM). Optimization using Mixed Integer Linear Programming (MILP) is used to satisfy the real-time and reliability requirements and optimization results are back annotated to UPDM models.