User Manual

Results page

This page presents most of the results that have already been calculated using the command Robust Assignments from the Results menu.

Layout

Depending on the selection previously made in that menu (by Input Order or by Variability Order), the alternatives appear in the same order as the Actions page (e.g. see Fig. 1) or appear by decreasing order of variability (e.g. see Fig. 2), where variability here means the difference between the best and worst categories in the alternatives assignment range.

 Fig. 1

 Fig. 2

The user may use the Results menu to change the alternatives' order. The user may also change the size of the grid cells and the size of the font by using the Height, Width and Font size buttons. The size of the area reserved for the outputs may be enlarged by dragging the line that divides the window in two parts. If the size of the right area of the window becomes smaller than the grid then scrollbars will appear. There may be cells smaller than its contents. In this case the contents appear truncated, but the users may see them entirely if they rest the mouse (without clicking) over one of such cells.

The file produced by the command File|Report (or button ) indicates the best and worst category for each alternative (if the input is consistent) plus its inferred assignment. The inference program and its solution will also appear in that file.

Interpreting the results

The Results page uses color to indicate the range of possible assignments for each alternative (robustness analysis), i.e. the categories where it may be assigned without violating the constraints, bounds and assignment examples. These ranges appear in green colour. In some situations, there are some intermediate categories where an alternative cannot be assigned, as for instance a28 in Fig.1: when a28 is good enough to be better than C1, then it reaches C3 without being assigned to C2. These situations are presented to the user as a "hole" in a range.

In each range, one of the cells has a darker shade of green, meaning it is the assignment recommended by IRIS, based on the inferred combination of parameter values. This combination is chosen to be relatively central to the set of combinations that respect all the bounds, constraints and examples. It is presented in the last row of the Results page, in green color.

If the user selects any cell in a range, then the penultimate line in the Results page shows a combination of parameter values that assigns the alternative in the cell's row to the category in the cell's column. For instance, Fig. 1 shows a combination of values that assigns a1 to C5, and Fig2 shows a combination of values that assigns a28 to C5.

The alternatives that are assignment examples can easily be identified by the blue color of their label, as in Fig.3. The same figure also shows a situation where the outputs are outdated because of a change in the inputs. This is shown by the use of a red font.

 Fig. 3

When the constraints are inconsistent

If there is no combination of parameter values that respects simultaneously all the bounds, constraints and assignment examples, then there will be no ranges to depict. In these cases, IRIS shows a proposal for assigning all the alternatives such that the maximum deviation is minimized (this can be seen in detail in the Inference Program page). The assignment examples that are not restored appear in red color, as in Fig. 4.

 Fig. 4