手法を比較

	順序優先度アプローチ	ELECTRE I
分野	意思決定	意思決定
系統	MCDM	MCDM
提唱年	1977	1968
提唱者	Ward Edwards and collaborators	Roy, B.
種類	Ordinal ranking-based weight derivation	Concordance–discordance (crisp outranking)
原典	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.	Roy, B. (1968). Classement et choix en présence de points de vue multiples (la méthode ELECTRE). Revue Française d'Informatique et de Recherche Opérationnelle
別名	OPA, Ordinal Priority	—
関連	4	8
概要	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.	ELECTRE (ELECTRE I — ELimination Et Choix Traduisant la REalité) is a outranking multi-criteria decision-making (MCDM) method introduced by Roy, B. in 1968. It turns a decision matrix of alternatives scored on multiple criteria into a structured, reproducible result.