Σύγκριση μεθόδων

	Προσέγγιση Ορθολογικής Προτεραιότητας	Αναλυτική Ιεραρχική Διαδικασία
Πεδίο	Λήψη Αποφάσεων	Λήψη Αποφάσεων
Οικογένεια	MCDM	MCDM
Έτος προέλευσης	1977	1980
Δημιουργός	Ward Edwards and collaborators	Saaty, T. L.
Τύπος	Ordinal ranking-based weight derivation	Pairwise comparison (eigenvalue)
Θεμελιώδης πηγή	Edwards, W. (1977). Use of multiattribute utility measurement for social decision making. In D. E. Bell, R. L. Keeney, & H. Raiffa (Eds.), Conflicting objectives in decisions (pp. 247-307). Wiley.	Saaty, T. L. (1980). The Analytic Hierarchy Process: Planning, Priority Setting, Resource Allocation. McGraw-Hill, New York ISBN: 978-0070543713
Εναλλακτικές ονομασίες	OPA, Ordinal Priority	—
Συναφείς	4	8
Σύνοψη	The Ordinal Priority Approach (OPA) is a family of methods that derive criteria weights directly from ordinal rankings rather than cardinal (numerical) preferences. Instead of asking decision-makers to assign exact weight values or ratio comparisons, OPA asks only: which criterion is most important, which is second, etc. The method then converts this ordinal ranking into numerical weights using geometric or statistical formulas.	AHP (Analytic Hierarchy Process) is a weight subjective multi-criteria decision-making (MCDM) method introduced by Saaty, T. L. in 1980. It turns a decision matrix of alternatives scored on multiple criteria into a structured, reproducible result.