পদ্ধতির তুলনা করুন

	পরিসংখ্যানভিত্তিক নির্ভরযোগ্যতা বিশ্লেষণ	অবক্ষয় মডেল (Degradation Models)	ফল্ট ট্রি অ্যানালাইসিস (FTA)
ক্ষেত্র	নির্ভরযোগ্যতা	নির্ভরযোগ্যতা	নির্ভরযোগ্যতা
পরিবার	Regression model	Regression model	Process / pipeline
উদ্ভবের বছর	1998	1998	1981
প্রবর্তক	William Meeker & Luis Escobar	Meeker, Escobar & Lu	Vesely et al. (US NRC Fault Tree Handbook)
ধরন	Parametric lifetime modeling	Stochastic degradation path model	Deductive top-down failure analysis
মৌলিক উৎস	Meeker, W. Q., & Escobar, L. A. (1998). Statistical Methods for Reliability Data. Wiley. ISBN: 978-0-471-14328-4	Meeker, W. Q., Escobar, L. A., & Lu, C. J. (1998). Accelerated degradation tests: modeling and analysis. Technometrics, 40(2), 89–99.	Vesely, W. E., Goldberg, F. F., Roberts, N. H., & Haasl, D. F. (1981). Fault Tree Handbook (NUREG-0492). U.S. Nuclear Regulatory Commission.
অপর নাম	Life Data Analysis, Survival Analysis (Engineering), Time-to-Failure Analysis, Güvenilirlik Analizi	Accelerated Degradation Testing, Degradation Path Models, Performance Degradation Analysis, Bozunma Modelleri	FTA, Fault Tree Method, Top-Down Reliability Analysis, Hata Ağacı Analizi
সম্পর্কিত	3	3	3
সারসংক্ষেপ	Statistical reliability analysis models the time-to-failure of components, systems, or products using parametric lifetime distributions fitted to observed or censored failure data. Formalized comprehensively by William Q. Meeker and Luis A. Escobar in their 1998 Wiley monograph, the framework integrates maximum likelihood estimation, censoring mechanisms, and distributional diagnostics to produce probability-of-failure curves, hazard rates, and quantile estimates that support design, warranty, and maintenance decisions.	Degradation models estimate product lifetime by tracking measurable performance characteristics—such as crack length, light output, or insulation resistance—over time rather than waiting for outright failure. Introduced in rigorous form by Meeker, Escobar, and Lu (1998), these models fit a stochastic degradation path to repeated measurements and define failure as the first time the characteristic crosses a predetermined threshold, enabling reliable lifetime inference from accelerated test data with very few or no observed failures.	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.