**Scoring model:**
This model selects an alternative which has the highest score (or the maximum
utility). Simple additive weighting, hierarchical additive weighting and
interactive simple additive weighting belong to this model.

**Compromising model:**
This model selects an alternative, which is closest

to the ideal solution: TOPSIS , LINMAP and nonmetric MDS belong to this category.

**Concordance model:**
This model arranges a set of preference rankings, which satisfies a given
concordance measure. Permutation method, linear assignment method, and
ELECTRE are considered to be in this model.