Various graphical user interfaces can be used for specification of
aspiration and reservation
levels as well as interpretation of solutions.
In the approach presented in this paper, the specified aspiration
and reservation levels are used for the generation of the component
achievement functions (CAF) defined by (5, 6).
This is an easy and natural way for reaching attainable
Pareto-optimal
goals which are defined for each criterion as a pair of aspiration
and reservation values.
Typically, initial aspiration values are far from being attainable,
and the user has to modify her/his preferences (expressed by pairs of
aspiration and reservation
levels) to decrease a distance between
aspiration point and nearest
Pareto-optimal solution.
The only way to do so is to decrease the aspiration level for
at least one criterion.
The tutorial section provides a more detailed discussion of this topic,
which is crucial for a rational use of most of the multi-criteria model
analysis methods.
