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| Robust felträdanalys× | Händelseträdsanalys (ETA)× | |
|---|---|---|
| Ämnesområde≠ | Försöksplanering | Tillförlitlighet |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1980s–2000s (robustness extensions to classical FTA ca. 1961) | 2002 |
| Upphovsperson≠ | Extended from classical FTA (Watson, 1961; Bell Labs / U.S. Air Force); robustness extensions developed through reliability engineering and uncertainty quantification research from the 1980s onward | Andrews & Moss |
| Typ≠ | Quantitative reliability and safety analysis with uncertainty propagation | Forward inductive logic tree |
| Ursprungskälla≠ | Vesely, W. E., Goldberg, F. F., Roberts, N. H., & Haasl, D. F. (1981). Fault Tree Handbook. U.S. Nuclear Regulatory Commission, NUREG-0492. link ↗ | Andrews, J. D., & Moss, T. R. (2002). Reliability and Risk Assessment (2nd ed.). Professional Engineering Publishing. ISBN: 978-1-86058-290-5 |
| Alias | Robust FTA, Uncertainty-aware FTA, FTA with interval analysis, Imprecise probability FTA | ETA, Event Sequence Diagram Analysis, Initiating Event Analysis, Olay Ağacı Analizi |
| Närliggande≠ | 6 | 2 |
| Sammanfattning≠ | Robust Fault Tree Analysis (Robust FTA) extends classical fault tree analysis by explicitly representing and propagating uncertainty in component failure probabilities. Rather than assigning single point estimates to basic events, it uses probability distributions, interval bounds, or imprecise probabilities, then propagates these through the logical tree structure to obtain bounds or distributions on the top-event failure probability. This makes risk conclusions defensible under incomplete or variable data. | Event Tree Analysis (ETA) is a forward inductive technique used in reliability and risk engineering to model the possible outcomes that follow an initiating event. Starting from a single undesired event, ETA traces all subsequent event sequences through a binary branching tree representing the success or failure of safety barriers and protective systems. Introduced formally in reliability and risk literature by Andrews and Moss (2002), it is widely applied in nuclear, chemical, and aerospace industries to quantify accident sequence probabilities and guide safety decision-making. |
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