For different types of models, different methods for approximating the FSCS or the EPH have been developed. Now, two types of methods are used mainly. Convex FSCS and EPH are approximated by polyhedra, and nonconvex FSCS and EPH are approximated by systems of balls. Visualizing the FSCS and the EPH is based on graphical display of their two-dimensional slices in the form of Interactive Decision Maps. Special software for displaying the slices was developed.
Decision maker receives information about feasible goals and objective trade-offs among criteria.
This helps to indicate a feasible goal consciously. Several experimental and methodological studies have been fulfilled as well.