Multi Criterion Decision Making

Multi-criteria decision making compares options across several relevant dimensions using explicit constraints and tradeoff assumptions. Approaches include dominance analysis, thresholds, weighted value models, and lexicographic rules; the appropriate method depends on the decision and values.

A decision with several criteria needs a rule for tradeoffs, not merely a list of attractive features. Minimum requirements eliminate unacceptable options; dominance can remove an option that is no better on any criterion and worse on at least one. Remaining options may require genuine value judgments rather than a single objectively given ranking.

Weighted scoring is one approach, but weights only mean something alongside the scales and ranges they apply to. A large weight on a nearly identical feature may matter less than a smaller weight on a consequential difference. Check whether compensation between criteria is acceptable, avoid double-counting overlapping criteria, and examine whether plausible changes in values or estimates reverse the choice.

When to use it

When decisions involve multiple competing criteria with no dominant option; when making the tradeoff structure explicit would improve decision quality; when comparing decision methods would reveal how much the outcome depends on the method; when preventing emotional salience from dominating multi-criteria evaluation.

How it can help

Define criteria and minimum requirements, use defensible scales, avoid double-counting, and select a method consistent with acceptable tradeoffs. Check sensitivity to weights, uncertain evidence, and stakeholder differences.