Requirements and Design Approach for a HighReliability.pdfVIP

Requirements and Design Approach for a High-Reliability System Christopher Byrnes The MITRE Corporation cb@Mitre.org Abstract The resulting system documentation had to satisfy a number of potential uses, each of which might have a The Unified Modeling Language (UML) is used to different audience: describe a system that needed to interface with many • System implementation. external systems, at various levels of detail • System-level specification. appropriate for a variety of user, developer, and tester • Update IERs. audiences. Rational’s Rose CASE tool was used to • Human Factors Engineering (HFE). produce a variety of UML-based products for these • Performance Engineering (PE). audiences. • CONOPS development. 1. Introduction • Definition of test threads. I created a Tactical system specification document • “Mission threads” definition required by the that provided a global (system-wide) view of how organizations producing some of these information flows among major system components external systems. and to and from external system interfaces. I built • Requirements Traceability Matrices (RTM). these system-level threads