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A Markovian Software Availability Measurement with a Geometrically Decreasing Failure-Occurrence Rate

Koichi TOKUNO, Shigeru YAMADA

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Summary :

We develop a software availability model incorporating software failure-occurrence and fault-correction times, under the assumption that the hazard rate for software failure-occurrence decreases geometrically with the progress in fault-removal process. Considering that the software system alternates two states, i.e. the operational state that a system is operating and the maintenance state that a system is inoperable due to the fault-correction activity, we model the time-dependent behavior of the system with a Markov process. Expressions for several quantities of software system perfomance are derived from this model. Finally, numerical examples are presented for illustration of software availability measurement.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E78-A No.6 pp.737-741
Publication Date
1995/06/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Reliability and Fault Analysis

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