DEX Model

Models used in DEXi Suite are prevalently qualitative. They are characterized by:

Here, the word “qualitative” is used for contrast with more traditional “quantitative” decision models, which are characterized by:

  • using continuous numerical attributes, which typically represent the decision-maker’s preferences, and

  • using numerical aggregation functions, such as the weighted sum.

In DEXi Suite, numerical attributes are supported to a limited extent and typically constitute just a fraction of DEX models. Numerical attributes can appear only as input attributes and are immediately mapped to some quantitative attribute using the corresponding discretization function.

Generally, a DEX model consists of: