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3. Taking dependencies into account, dynamic ADDs
3.1 General considerations on addiction
The preceding developments assume that the primary events of the ADD 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 components), 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 leaves (primary events) or concern many leaves (primary events). On the other hand, the extent of these dependencies may be limited to a few leaves (primary events) or concern many leaves. They may even affect all the leaves in the tree, as we have seen with reliability...
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Taking dependencies into account, dynamic ADDs
Conclusion
Bibliography
Software tools
GRIF-Workshop software package (interactive graphics for reliability), developed by ELF and then for TOTAL by SATODEV.
module Tree: fault trees ;
ETree module: event trees ;
SIL module: BDF adapted to functional safety ;
Petri module: stochastic Petri nets ;
...
Standards and norms
- - CEI 61078 -
- - CEI 60050-192 -
- - CEI 61703 -
- - ISO/TR 12489 -
- - CEI 61025 -
- - CEI 61165 -
- - CEI 62551 -
- - CEI 61508 -
- - CEI 61511 -
- - CEI 62740 -
- - CEI 62502 -
Directory
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GRIF-Workshop software package. SATODEV (SAfety TOols DEVelopment) :
Organizations – Federations – Associations (non-exhaustive list)
International Electrotechnical Commission IEC (IEC)
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