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	Flerrespons-felträdanalys	Händelseträdsanalys (ETA)
Ämnesområde	Försöksplanering	Tillförlitlighet
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1961 (FTA); multi-response extensions developed from the 1980s onward	2002
Upphovsperson	H. A. Watson (Bell Labs); extended by W. E. Vesely and others for multi-output contexts	Andrews & Moss
Typ	Deductive reliability and risk analysis	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.	Andrews, J. D., & Moss, T. R. (2002). Reliability and Risk Assessment (2nd ed.). Professional Engineering Publishing. ISBN: 978-1-86058-290-5
Alias	MR-FTA, multi-output fault tree analysis, multi-criterion fault tree analysis, multi-response FTA	ETA, Event Sequence Diagram Analysis, Initiating Event Analysis, Olay Ağacı Analizi
Närliggande	5	2
Sammanfattning	Multi-response fault tree analysis (MR-FTA) extends classical fault tree analysis to systems where multiple distinct top-level failure events or outcome metrics must be evaluated simultaneously. Rather than constructing a single tree for one top event, the analyst builds and quantifies parallel trees — one per response — then aggregates results to rank critical failure paths across all responses at once, enabling holistic system risk prioritization.	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.