NDLI: Reliability optimization of redundant software with correlated failures

Content Provider	IEEE Xplore Digital Library
Author	Gutjahr, W.
Copyright Year	1998
Description	Author affiliation: Dept. of Stat., Wien Univ., Austria (Gutjahr, W.)
Abstract	Several authors have addressed the problem of reliability optimization of modular software with redundancy. At present, these approaches seem to be limited by the fact that they use statistical independence assumptions for different program versions. In view of strong empirical evidence of positive failure correlations between program versions, it is desirable to generalize these reliability optimization techniques by taking such correlations explicitly into consideration. In the presented paper, this is done based on a multiversion software failure correlation model tracing back to D.E Eckhardt and L.D. Lee (1985). We show how taking failure correlation into account extends the corresponding optimization problems, and how they can be treated computationally. In particular, in the (practically relevant) case of components with relatively high reliability, the optimization problems reduce to knapsack type problems which can, for relevant problem sizes, be solved with rather low computational effort. Also for the general case, solution techniques are outlined.
Starting Page	293
Ending Page	302
File Size	127454
Page Count	10
File Format	PDF
ISBN	0818689919
ISSN	10719458
DOI	10.1109/ISSRE.1998.730893
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-11-04
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Costs Statistics Computer science Software systems Application software Fault tolerant systems Redundancy Testing
Content Type	Text
Resource Type	Article

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