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4. Quantified LOPA method
4.1 Principle
The quantified LOPA approach corresponds to a variation of the LOPA method in which :
1. frequencies of initiating events tend to be more representative of the configuration studied (use of sector-specific databases and/or analysis of feedback);
2. the failure probabilities of the safety barriers are estimated using a "computational" approach (where possible, depending on the type of barrier), taking into account :
for instrumented barriers: equipment failure rates, architectures, test periods, etc,
for human barriers: the main parameters influencing the probability of error or failure (level of training, level of stress, complexity of the action, etc.);...
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Quantified LOPA method
Conclusion
Bibliography
Standards and norms
- Functional safety of safety-related electrical/electronic/programmable electronic systems – Part 1: General requirements. - NF EN 61508-1 :2011 - Janvier 2011
- Functional safety of safety-related electrical/electronic/programmable electronic systems – Part 2: Requirements for safety-related electrical/electronic/programmable electronic systems. - NF EN 61508-2 :2011 - Janvier 2011
- Functional safety of safety-related...
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International Electrotechnical Commission IEC (IEC)
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