手法を比較

	ロバスト信頼性解析	フォールトツリー解析 (FTA)
分野	実験計画法	信頼性
系統	Process / pipeline	Process / pipeline
提唱年	1980s–1990s (integration formalized in engineering literature)	1981
提唱者	Synthesized from Taguchi robust design and classical reliability theory (Kececioglu, Taguchi)	Vesely et al. (US NRC Fault Tree Handbook)
種類	Quantitative reliability engineering method	Deductive top-down failure analysis
原典	Kececioglu, D. (1991). Reliability Engineering Handbook (Vol. 1). Prentice Hall. ISBN: 978-0137720774	Vesely, W. E., Goldberg, F. F., Roberts, N. H., & Haasl, D. F. (1981). Fault Tree Handbook (NUREG-0492). U.S. Nuclear Regulatory Commission.
別名	RRA, reliability robustness analysis, uncertainty-aware reliability analysis, robust probabilistic reliability	FTA, Fault Tree Method, Top-Down Reliability Analysis, Hata Ağacı Analizi
関連	4	3
概要	Robust reliability analysis is an engineering method that combines classical reliability estimation with robustness principles to quantify and improve system dependability in the presence of parameter uncertainty and variability. Rather than assuming fixed input values, it propagates distributions of noise factors through a reliability model to produce probability-of-failure estimates that remain valid across a range of operating conditions and manufacturing tolerances.	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.