Bounds on the Reliability of Fault-Tolerant Software Built by Forcing Diversity

Fault tolerance via diversity has been advocated as a viable defence against common-mode failure in safety critical systems. The consequences of using diverse, redundant software components in fault-tolerant, software-based systems have been the subject of much research. In particular, Littlewood an...

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Bibliographic Details
Published inComputer Safety, Reliability, and Security Vol. 4680; pp. 411 - 416
Main Author Salako, Kizito
Format Book Chapter
LanguageEnglish
Published Germany Springer Berlin / Heidelberg 2007
Springer Berlin Heidelberg
SeriesLecture Notes in Computer Science
Subjects
Equivalent Software
Failure Diversity
Fault Tolerance
Force Diversity
Software Component
Online AccessGet full text
ISBN3540751009
9783540751007
ISSN0302-9743
1611-3349
DOI10.1007/978-3-540-75101-4_38

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Summary:Fault tolerance via diversity has been advocated as a viable defence against common-mode failure in safety critical systems. The consequences of using diverse, redundant software components in fault-tolerant, software-based systems have been the subject of much research. In particular, Littlewood and Miller showed analytically how “forcing” diversity between redundant software components might achieve higher expected system reliability than if these components failed independently. But their theorems concerned very special scenarios. This paper examines various lower and upper bounds on the expected reliability of systems built by ”forcing diversity” and specify conditions for forced diversity to guarantee improved upper bounds on the system’s expected probability of failure on demand (pfd).
ISBN:3540751009
9783540751007
ISSN:0302-9743
1611-3349
DOI:10.1007/978-3-540-75101-4_38