Fault Tree Analysis for Software Design
SEW '02 Proceedings of the 27th Annual NASA Goddard Software Engineering Workshop (SEW-27'02)
A History-Based Approach for Early Faulty State Detection
COMPSAC '96 Proceedings of the 20th Conference on Computer Software and Applications
A safety-focused verification using software fault trees
Future Generation Computer Systems
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With the increased use of software controls in critical realtime applications, a new dimension has been introduced into software reliability-the "cost" of errors. The problems of safety have become critical as these applcations have increasingly included areas where the consequences of failure are serious and may involve grave dangers to human life and property. This paper defines software safety and describes a technique called software fault tree analysis which can be used to analyze a design as to its safety. The technique has been applied to a program which controls the flight and telemetry for a University of California spacecraft. A critical failure scenario was detected by the technique which had not been revealed during substantial testing of the program. Parts of this analysis are presented as an example of the use of the technique and the results are discussed.