Complex Proportional Assessment
Updated 2026-08-11
INTRODUCTION
English translation pending.
CORE DEFINITION
COPRAS, Complex Proportional Assessment, is a multi-criteria decision method proposed by Zavadskas and Kaklauskas in 1996. Its distinguishing features are that it simultaneously considers maximizing criteria, the benefit type, and minimizing criteria, the cost type; it uses a weighted normalized decision matrix; and it computes the relative significance and utility degree of each alternative. The core formula for relative significance Qi is Si+ plus S-min times the sum of Si- divided by Si- times the sum of S-min. Because benefit and cost criteria are handled separately, the computation stays transparent and is especially suited to problems where both types must be weighed at once.
SCAFFOLDING EFFECT
Reduce cognitive load
- Separate benefit from cost: always process the maximizing and minimizing criteria in two distinct streams. - Score relative significance: compute a single directly comparable utility figure for each alternative. - Rank transparently: sort the alternatives so that the resulting ordering is fully explainable.
Anchor fast decisions
Built on the separation of benefit and cost. Maximizing and minimizing criteria are handled in parallel and combined into a relative significance score, which ranks alternatives on a single comparable scale.
MINIMUM ACTION
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Source support: Explicit
- pubmed.ncbi.nlm.nih.govhttps://pubmed.ncbi.nlm.nih.gov/38624785/verified
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