Fault Tree Analysis (FTA): Complete ISO 31010 Risk Assessment Guide
Fault Tree Analysis (FTA) is a deductive risk assessment technique used to analyze how combinations of failures can lead to an undesired event. ISO 31010 recognizes FTA as an advanced technique for identifying causes, evaluating scenarios and improving preventive controls.
Key Takeaways
- ✓FTA starts with a top event and analyzes causes backwards.
- ✓It uses AND and OR logical gates.
- ✓It supports qualitative and quantitative risk analysis.
- ✓It is widely used in safety-critical industries.
- ✓It helps organizations improve preventive controls.
Fault Tree Analysis (FTA)
Executive Summary
Fault Tree Analysis (FTA) is a systematic technique used to analyze the causes that can lead to an undesired event.
The method follows a deductive approach:
It starts with a top event and works backwards to identify combinations of causes that may generate it.
FTA is widely used in industries where reliability, safety and availability are critical:
- aerospace;
- energy;
- manufacturing;
- oil and gas;
- technology;
- healthcare;
- critical infrastructure.
Within ISO 31010, Fault Tree Analysis helps organizations understand complex causal relationships, evaluate existing controls and identify improvement opportunities to reduce critical event probability.
What is Fault Tree Analysis?
Fault Tree Analysis is a graphical technique that represents logical relationships between a top event and its causes.
It uses logical operators such as:
- AND gates;
- OR gates;
- basic events;
- intermediate events;
- undeveloped events.
The main question answered by FTA is:
What combination of failures can cause this event?
Related topics
Frequently asked questions
What is Fault Tree Analysis?
It is a risk analysis technique that identifies combinations of causes that may produce an undesired event.
Is Fault Tree Analysis included in ISO 31010?
Yes. ISO 31010 recognizes Fault Tree Analysis as a risk assessment technique.
What is the difference between FMEA and FTA?
FMEA analyzes failure modes from causes to effects, while FTA starts with an event and analyzes possible causes.
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