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D. Tang, H. Hecht, M. Hecht, R. Brill, "Quantitative Reliability and Availability
Assessment for Critical Systems Including Software", Proceedings of the 12th Annual
Conference on Computer Assurance, Gaitherburg, Maryland, June, 1997
In many cases, it is possible to derive a quantitative reliability or availability
assessment for systems containing software with the appropriate use of system-level
measurement-based modeling and supporting data. This paper demonstrates the system-level
measurement based approach using a simplified safety protection system example.
The approach is contrasted with other software reliability prediction methodologies.
The treatment of multiple correlated and common mode failures, systematic failures,
and degraded states are also discussed. Finally a tool called
MEADEP, which is now
under development, is described. The objective of the tool is to reduce the system-level
measurement-based approach to a practical task that can be performed on systems
with element failure rates as low as 10-6 per hour.
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