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8. Conclusion
It is important to bear in mind that failure probabilities are necessarily subject to uncertainty. Indeed, to carry out the calculations, the analyst needs to use failure rates, among other things, and to define the weight of common cause failures.
As far as failure rates are concerned, the use of databases is the most widespread way of feeding reliability calculations. However, depending on the database consulted, differences of over a factor of 10 can be observed. The choice of database and the correct interpretation of the data it contains are therefore crucial steps in the assessment of PFD avg .
When it comes to estimating the weight of common-cause failures, the methods generally used are partly based on expert opinion.
The PFD avg ...
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Conclusion
Glossary
Bibliography
Standards and norms
- Analysis techniques for dependability – Reliability diagram block and Boolean methods - IEC 61078 -
- Functional safety of safety-related electrical/electronic/programmable electronic systems – chapters 1 to 7 - IEC 61508 -
- Sécurité fonctionnelle des systèmes instrumentés de sécurité pour le secteur de l'industrie des procédés continus - IEC 61511 -
- Analysis techniques for dependability – Reliability...
Organizations
French National Institute for Industrial Environment and Risks (INERIS) http://www.ineris.fr
Instrumentation Society of America (ISA) https://www.isa.org/http://www.isa-france.org
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