Logical Decisions - Classweb
Logical Decisions - Classweb Logical Decisions - Classweb
Each of these displays can be selected with a Review menu item. Common Units (SUF) Graphs Single measure utility functions (SUFs) convert the level (or "raw score") of a measure into the common units of "utility." You can display the SUF for any measure by selecting the Review::Common Units option. The option duplicates the SUF assessment screen in the Assess::Common Units option in a form that lets you print it, or copy it to the clipboard. When you select the option, you first select a measure to display. LDW then displays the SUF for that measure for the active preference set. An example is shown in Figure 8-1. Figure 8-1. Example of Review::Common Units display. The horizontal axis (X-axis) of this display shows the nominal units and range for the measure. The vertical tics on that axis show the levels on the measure for the alternatives. The vertical axis (Y-axis) is in units of utility (usually scaled from zero to one). 8-2 Section 8 -- Using LDW 3: Reviewing Results
The curve shows how the utility function converts any level in the measure's nominal units to a utility. For measures that use labels, LDW also lets you display the SUF as a histogram similar to that used in the direct assessment method. Just click “Yes” to the question LDW asks when you select this option. Computing Utilities From Measure Levels The Review::Compute Utilities option lets you compute utilities for a measure based on its SUF in the active preference set. You can also use the option to compute the measure level on the measure that would result in a particular utility. When you select this option you will see the dialog box in Figure 8-2. Figure 8-2. Dialog box for Review::Compute Utilities option. To select the active measure, just choose it from the combo box at the top of the dialog box. To compute the utility for a level on the active measure, just enter a level in the edit box labeled "Level:". Section 8 -- Using LDW 3: Reviewing Results 8-3
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Each of these displays can be selected with a Review menu item.<br />
Common Units (SUF) Graphs<br />
Single measure utility functions (SUFs) convert the level (or "raw<br />
score") of a measure into the common units of "utility." You can<br />
display the SUF for any measure by selecting the<br />
Review::Common Units option.<br />
The option duplicates the SUF assessment screen in the<br />
Assess::Common Units option in a form that lets you print it, or<br />
copy it to the clipboard.<br />
When you select the option, you first select a measure to display.<br />
LDW then displays the SUF for that measure for the active<br />
preference set.<br />
An example is shown in Figure 8-1.<br />
Figure 8-1. Example of Review::Common Units display.<br />
The horizontal axis (X-axis) of this display shows the nominal<br />
units and range for the measure. The vertical tics on that axis<br />
show the levels on the measure for the alternatives. The vertical<br />
axis (Y-axis) is in units of utility (usually scaled from zero to one).<br />
8-2 Section 8 -- Using LDW 3: Reviewing Results
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