Σύγκριση μεθόδων

	Μέθοδος Αξιοπιστίας Δεύτερης Τάξης (SORM)	Μεθοδολογία Επιφανειών Απόκρισης με Βελτιστοποίηση Συνάρτησης Επιθυμητότητας
Πεδίο	Μηχανική Αξιοπιστίας	Μηχανική Αξιοπιστίας
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1979	1951
Δημιουργός	Bernd Fiessler	George Box and Kenneth Wilson
Τύπος	Reliability analysis method	Optimization methodology
Θεμελιώδης πηγή	Fiessler, B., Neumann, H. J., & Rackwitz, R. (1979). Quadratic limit states in structural reliability. Journal of the Engineering Mechanics Division, 105(4), 661-676.	Box, G. E. P., & Wilson, K. B. (1951). On the experimental attainment of optimum conditions. Journal of the Royal Statistical Society, 13(1), 1-45.
Εναλλακτικές ονομασίες	SORM, Second-order approximation	RSM, Desirability function, Multi-response optimization
Συναφείς	4	4
Σύνοψη	The Second-Order Reliability Method (SORM) is an extension of FORM that improves failure probability estimates by accounting for the curvature of the limit-state surface at the design point. Introduced by Fiessler, Neumann, and Rackwitz in 1979, SORM provides more accurate approximations for nonlinear failure surfaces while remaining computationally efficient. It has become the standard refinement when FORM accuracy is insufficient.	Response Surface Methodology (RSM) is a set of statistical and mathematical techniques for modeling and optimizing processes with multiple inputs (factors) and outputs (responses). The Desirability Function approach, introduced by Harrington (1965) and refined by Derringer and Suich (1980), extends RSM to solve multi-response optimization problems by combining competing objectives into a single index. This methodology is essential in product and process development where engineers must balance performance, cost, and reliability.