Logical Decisions - Classweb

with the highest overall utility. The edit box labeled "Utility Lines
to Show" determines how many "iso-utility" lines LDW will draw
in the figure. The lines will be color coded, with red lines
indicating lower utilities and green lines indicating higher
utilities. You can select up to 250 lines. Selecting a large number
of lines will result in the area of the graph being almost
completely covered with varying shades of red and green. If you
select only one line, you can enter the utility to show with the
single line in the edit box labeled "Utility to Show". LDW will
display 10 points along the line and will label them with their
levels on the selected measures (see Figure 8-9).
When you click "OK", LDW will display a graph like the one in
Figure 8-8.
Figure 8-8. Example of Review::Graph Pairs of Measures option.
The graph is like the tradeoff graph from the Review::Single
Tradeoffs option. It shows a rectangle with one measure on the
horizontal axis and one on the vertical axis. You can think of any
point in this rectangle as a simplified alternative that has the
indicated levels on the two measures and a nominal level on all of
the other measures. For example, a point in the upper left corner
of the rectangle represents a computer alternative with a hard
disk size of 120 mb and a hard disk access time of 15 ms (the best
hard drive in the rectangle). A point in the lower right corner
8-10 Section 8 -- Using LDW 3: Reviewing Results