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7. Taking dependencies into account
7.1 General considerations on addiction
The preceding developments assume that the BDF blocks evolve independently of each other. However, in reality, this assumption is often not respected, due to the limited number of maintenance teams, the existence of common cause failures (leading to the simultaneous failure of several blocks), sequential aspects (the order of occurrence of failures changes what happens at system level), etc. On the other hand, the extent of these dependencies may be limited to a few blocks, or concern many blocks. On the other hand, the extent of these dependencies may be limited to a few blocks, or concern many blocks. They may even affect all blocks, as we have seen with reliability calculations.
When dependencies are confined to a...
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Taking dependencies into account
Conclusion
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...
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
GRIF-Workshop software package. SATODEV (SAfety TOols DEVelopment) http://www.satodev.com
Organizations – Federations – Associations (non-exhaustive list)
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