Abstract
The current requirements of software are intensively based on load sharing, on-demand services, cascading requirements, redundancy for reliability and executing on heterogeneous environments. It needs precise architectural details for development of such software systems. These are large scale software systems with complex interactions amongst the constituent components. Testing for performance and conformance to quality requires perspective modeling fordesigning critical systems. The analysis of these systems is focused on dynamic or execution time behavior for achieving quality. In the same context, this paper redefines Functional Flow Specification for dynamic analysis of critical and collaborating systems. Functional Flow based modeling is a mature concept in the domain of system engineering but is rarely applicable to software systems. Functional Flow Block Reliability Diagram (FFBRD) is a notation for abstract view of the system evolution and interactions. This adopts the specification format of UML and system modeling conventions of SysML specially Enhanced Functional Flow Block Diagram (EFFBD). The flow of data and control are so designed that it best suits the approaches for quality analysis like system reliability. The method proposed is System Reliability with UML or SR-UML for generating test through FFBRD. It also caters to the need of designing software in a familiar formalization for extending, translating and simulating with existing algorithms. From the results collected through various scenarios, we can conclude that SR-UML is instrumental in process improvement of current software development methods.
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