Description
The FTA (fault tree analysis) is a scientific method for detailed fault analysis. It serves the systematic identification and documentation of possible causes for errors or misconduct. Found causes are broken down as precisely as possible to get a comprehensive fault analysis.
Effort
Medium
Complexity
Medium
Method Type
Quantitative
Semi-Quantitative
Qualitative
ISO 31000
Risk Analysis - Causes/Threats
Risk Analysis - Likelihood
Prerequisites
- System or process descriptions should be available
- Documentation that can already provide information on the causes of errors should be available
Basic Approach
- Carrying out a system analysis, i.e. close examination of the system and its interfaces
- Definition of undesired events (errors)
- Determination of the failure probabilities if possible
- Identification of causes for the undesired events
- Entering the causes in the fault tree
- Suggested software: Microsoft Visio & Edraw Max
Advantages
- Systematic presentation of the causes
- Measures for risk minimization can be derived
- A valuable basis for the implementation of an FMEA
Disadvantages
- Training is necessary before the first execution
- The availability of resources must be guaranteed
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