Availability and safety are universal characteristics of technical systems that have a decisive influence on the system configuration, the procedures and equipment used, as well as the system operation. To date it has, however, not been possible to represent these characteristics in a transparent and integrated form. Starting from a qualitative classification of system states that have an influence on system dependability, i.e. from completely correct operation to the damage state, this paper proposes an availability/safety diagram that provides for an integrated system representation. Simple scaling even allow the orthogonal diagram coordinates availability and hazard to be used for quantitative positioning. The approach proposed in this paper of representing dependability by means of the orthogonal coordinates availability and safety, with the quantities of relative availability and hazard, using simple proportional scales, provides a system of assessment into which a wide variety of dependability terms may be incorporated both qualitatively and quantitatively. It is an approach that allows system-based or component-based units that have hitherto proved to be incompatible as items under review to be compared in a transparent manner.
Qualitative and quantitative description of reliability characteristics in availability/safety diagrams
2003
10 Seiten, 5 Bilder, 6 Quellen
Conference paper
English
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