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Logical Decisions - Classweb

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In the window, the upper pane shows the current overall utilities<br />

for the alternatives. The lower pane shows the weights for the<br />

goals and measures. (The weights are adjusted to sum to 1.0 if<br />

there are interactions).<br />

Goals are shown in green at the top of the pane, and measures are<br />

shown in blue below the goals. You can temporarily adjust the<br />

weight for a measure or goal in the lower pane and see the effect<br />

on the alternatives' utilities in the upper pane.<br />

You adjust a weight for a measure or goal by changing the length<br />

of its bar. To change a bar's length, you drag its right hand edge.<br />

When finish dragging, LDW will redraw the bar and the weight<br />

for the member will be updated based on the bar’s proportional<br />

length.<br />

You can also directly enter a new weight by clicking on the<br />

current weight. An edit bor where you can enter the new weight<br />

will appear.<br />

After you adjust a weight, the weights for the other goals and<br />

measures will be increased or decreased to ensure that the<br />

weights sum to 1.0. LDW will then use these adjusted weights to<br />

recalculate the overall utilities for the alternatives. The upper<br />

pane will be adjusted to reflect the new utilities.<br />

The changes you make in the dynamic sensitivity graph are only<br />

temporary. When you close the window the weights and<br />

alternative utilities will revert to what they were before.<br />

Dynamic Sensitivity Options. The Sensitivity menu appears<br />

when you select the Results::Dynamic Sensitivity option. It has<br />

two options.<br />

The Sensitivity::Restore Weights option restores all of the weights<br />

(and bars) to the values they had when you first created the<br />

window.<br />

The Sensitivity::Save Weights option saves the current weights in<br />

a new preference set called “Sensitivity.” The other information,<br />

such as the single measure utility functions (SUFs), is copied from<br />

the active preference set with no change.<br />

8-28 Section 8 -- Using LDW 3: Reviewing Results

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