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.);...
The Ultimate Scientific and Technical Reference
This article is included in
Safety and risk management
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
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...
Software tools
GRIF-Workshop software package (interactive graphics for reliability)
Directory
Organizations – Federations – Associations (non-exhaustive list)
International Electrotechnical Commission IEC (IEC)
Association of Measurement, Control and Automation Equipment Operators (EXERA)
...
The Ultimate Scientific and Technical Reference
