Istituto di Scienza e Tecnologie dell'Informazione     
Bondavalli A., Chiaradonna S., Di Giandomenico F., Strigini L. Dependability models for iterative software considering correlation between successive inputs. In: IPDS'95 - Proceedings of IEEE International Computer Performance and Dependability Symposium (Erlangen, Germany, 24-26 april 1995). Proceedings, pp. 13 - 21. IEEE, 1995.
We consider the dependability ofprograms 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 ofthe program under analysis. In this work we present a model in which dependencies among input values of successive iterations are taken into account in studying the dependability of iterative software. We consider also the possibility that repeated. Non fatal 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.
Subject Dependability models
B.8.1 Reliability, Testing, and Fault-Tolerance
C.4 Performance of systems

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