QUALItative FLEXible multiple criteria method
QUALIFLEX (QUALItative FLEXible multiple criteria method) is a ranking multi-criteria decision-making (MCDM) method introduced by Paelinck, J. H. P. in 1978. It turns a decision matrix of alternatives scored on multiple criteria into a structured, reproducible result.
Key highlights
- Follows a transparent, reproducible computational procedure that can be audited step by step.
- Handles multiple criteria of differing scales and units within a single decision matrix.
Intuition
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How it works
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When to use it
QUALIFLEX finds the permutation π* that maximises the weighted concordance index I(π). It is exact (exhaustive) for small m; for m > 7–8 use branch-and-bound or heuristic search. QUALIFLEX handles ordinal and cardinal weights equally well and naturally reveals near-optimal permutations (alternatives with similar I(π) values).
Strengths & limitations
- Follows a transparent, reproducible computational procedure that can be audited step by step.
- Handles multiple criteria of differing scales and units within a single decision matrix.
- Results depend on the chosen normalisation, weights, and parameter settings.
Common pitfalls
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Sources
- 1.Paelinck, J. H. P. (1978). Qualiflex: A flexible multiple-criteria method. Economics Letters
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Cite this page
ScholarGate. (2026, June 2). QUALIFLEX. ScholarGate. https://scholargate.app/decision-making/qualiflex