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Using an assurance case to support independent assessment of the transition to a new GPS ground control system

8 years 5 months ago
Using an assurance case to support independent assessment of the transition to a new GPS ground control system
We describe a specific application of assurance cases to the problem of ensuring that a transition from a legacy system to its replacement will not compromise mission assurance objectives. The application in question was the transition of the Global Positioning System (GPS) to a new ground-control system. The transition, which took place over five days, required uninterrupted control of the GPS satellite constellation while control was transferred from a 1970s-era mainframe to a distributed architecture. We created an assurance case so that the procedural documentation we had could be restructured into a form amenable to analysis. The analysis concluded that there were no major hazards; this conclusion was validated by a successful transition.
Elisabeth A. Nguyen, William S. Greenwell, Myron H
Added 19 Oct 2010
Updated 19 Oct 2010
Type Conference
Year 2008
Where DSN
Authors Elisabeth A. Nguyen, William S. Greenwell, Myron Hecht
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