This paper describes the work carried out as part of a Design to Life Cost Study. The aim of this phase was to examine the loss of system availability due to software in a computer system installed in a Royal Naval frigate. The paper shows that the simple classification of possible causes of error for such a system into hardware and software is inadequate. This is demonstrated by examination of two approaches to understanding the nature of software integrity; counting the programming errors and the consideration of the behaviour of a program in operation. The latter approach was applied to field data collected from a Royal Naval frigate. Analysis showed that the reported loss of system availability differed from that truly due to software. This supported the hypothesis that a simple classification of errors was inadequate. It was found that system behaviour could be suitably represented by Weibull models.
The software integrity of a computer system installed in a Royal Naval frigate
Die Vollstaendigkeit der Software eines Computersystems, das bei einer koeniglichen Marinefregatte eingesetzt ist
Microelectronics and Reliability ; 22 , 6 ; 1061-1066
1982
6 Seiten, 3 Bilder, 1 Tabelle, 2 Quellen
Aufsatz (Zeitschrift)
Englisch
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