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Dependability models for iterative software considering correlation between successive inputs

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4 Author(s)
Bondavalli, A. ; Istituto CNUCE, CNR, Pisa, Italy ; Chiaradonna, S. ; Di Giandomenico, F. ; Strigini, L.

We consider the dependability of programs of an iterative nature. The dependability of software structures is usually analysed using models that are strongly limited in their realism by the assumptions made to obtain mathematically tractable models and by the lack of experimental data. The assumption of independence between the outcomes of successive executions, which is often false, may lead to significant deviations from the real behaviour of the program under analysis. In this work we present a model in which dependencies among input values of successive iterations me taken into account in studying the dependability of iterative software. We consider also the possibility that repeated, nonfatal failures may together cause mission failure. We evaluate the effects of these different hypotheses on (1) the probability of completing a fixed-duration mission, and (2) a performability measure

Published in:

Computer Performance and Dependability Symposium, 1995. Proceedings., International

Date of Conference:

24-26 Apr 1995

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