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	Risk-Based Failure Mode and Effects Analysis (RBFMEA)	Feltträdanalys (FTA)
Ämnesområde	Försöksplanering	Tillförlitlighet
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1949 (FMEA origins); risk-prioritised RPN framework circa 1977–1980s (AIAG automotive)	1981
Upphovsperson	U.S. Department of Defense / MIL-STD-1629A; formalised in IEC 60812	Vesely et al. (US NRC Fault Tree Handbook)
Typ	Quantitative risk-prioritisation technique	Deductive top-down failure analysis
Ursprungskälla	International Electrotechnical Commission. (2018). IEC 60812:2018 — Failure modes and effects analysis (FMEA and FMECA). IEC.	Vesely, W. E., Goldberg, F. F., Roberts, N. H., & Haasl, D. F. (1981). Fault Tree Handbook (NUREG-0492). U.S. Nuclear Regulatory Commission.
Alias	RBFMEA, Risk-based FMEA, Risk-prioritised FMEA, Quantitative FMEA	FTA, Fault Tree Method, Top-Down Reliability Analysis, Hata Ağacı Analizi
Närliggande	6	3
Sammanfattning	Risk-based failure mode and effects analysis (RBFMEA) is a structured engineering technique that identifies every way a system or process can fail, assesses the risk of each failure mode using a numerical Risk Priority Number (RPN = Occurrence × Severity × Detectability), and prioritises corrective actions accordingly. Rooted in MIL-STD-1629A and standardised in IEC 60812:2018, it is the dominant proactive reliability and safety tool in aerospace, automotive, pharmaceutical, and manufacturing industries.	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.