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1. General considerations for reliability diagrams
The Reliability Block Diagram (RBD), also known as the Reliability Diagram, is defined in the international standard IEC 61078 as a logical graphical representation of a system showing how the operational states of its sub-entities (represented by blocks) and their combinations affect the operational state of the system.
This definition differs from that given by the IEV 192 international electrotechnical vocabulary, which refers to reliability instead of serviceability. This distinction is important because, in the general case and in the mathematical sense of the term, the reliability diagram does not calculate the reliability of the system as a function of the reliability of its components, but only its availability as a function of the availability of its components. As this...
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General considerations for reliability diagrams
Main assumptions and mathematical bases for BDFs
Bibliography
Software tools
GRIF-Workshop software package (GRaphique Interactif pour la Fiabilité), developed by ELF and then for TOTAL by SATODEV
– BFIAB module: reliability diagrams
– Module Tree: fault trees
– ETree module: event trees
– SIL module: BDF adapted to functional safety
– Petri module: stochastic Petri nets...
Websites
GRIF-Workshop: Demo versions downloadable at http://grif-workshop.fr
Standards and norms
- Diagrammes de fiabilité - CEI (IEC) CEI 61078 - 2016
- International electrotechnical vocabulary – Part 192: Dependability - CEI (IEC) IEC 60050-192 (IEV 192) - 2015
- Expressions mathématiques pour les termes de fiabilité, de disponibilité, de maintenabilité et de logistique de maintenance - CEI (IEC) CEI 61703 - 2016
- Petroleum, petrochemical and natural gas industries – Reliability modelling and...
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GRIF-Workshop software package. SATODEV (SAfety TOols DEVelopment) http://www.satodev.com
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