השוואת שיטות

	ניתוח עץ אירועים רב-תגובתי	ניתוח עץ תקלות (FTA)
תחום	תכנון ניסויים	אמינות
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1975 (ETA); multi-response extension: 1990s–2000s	1981
הוגה השיטה	Developed from Event Tree Analysis (originated at WASH-1400 nuclear safety study, U.S. Nuclear Regulatory Commission, 1975); multi-response extension adapted from design-of-experiments and reliability engineering practice	Vesely et al. (US NRC Fault Tree Handbook)
סוג	Probabilistic safety and reliability analysis with multiple simultaneous response outcomes	Deductive top-down failure analysis
מקור מכונן	Stamatelatos, M., Vesely, W., Dugan, J., Fragola, J., Minarick, J., & Railsback, J. (2002). Fault Tree Handbook with Aerospace Applications. NASA Office of Safety and Mission Assurance.	Vesely, W. E., Goldberg, F. F., Roberts, N. H., & Haasl, D. F. (1981). Fault Tree Handbook (NUREG-0492). U.S. Nuclear Regulatory Commission.
כינויים	MR-ETA, multi-output event tree analysis, multi-response ETA, probabilistic event tree with multiple responses	FTA, Fault Tree Method, Top-Down Reliability Analysis, Hata Ağacı Analizi
קשורות	5	3
תקציר	Multi-response Event Tree Analysis (MR-ETA) extends classical event tree analysis by simultaneously tracking multiple system performance or safety response variables across all accident sequences. Instead of evaluating a single outcome (e.g., probability of failure), it propagates several concurrent response metrics — such as damage severity, downtime, cost, and environmental impact — through the event tree branches, enabling richer risk characterization and trade-off decisions under a single probabilistic framework.	Fault Tree Analysis (FTA) is a top-down, deductive reliability method that begins with an undesired top-level failure event and systematically traces backward through chains of contributing causes using Boolean logic gates (AND, OR). First formalized by Watson at Bell Telephone Laboratories in 1961 and later standardized by Vesely, Goldberg, Roberts, and Haasl in the landmark 1981 NRC Fault Tree Handbook, FTA has become a cornerstone of quantitative risk assessment in nuclear, aerospace, and industrial safety engineering.