Logical Decisions - Classweb
Logical Decisions - Classweb Logical Decisions - Classweb
the same level. LDW provides a graphical method for directly entering the utilities. When you select this method, LDW displays a screen like the one in Figure 7-10. Figure 7-10. Direct Entry assessment screen. In this screen, each alternative is represented by its name, its level, an edit box and a bar. The length of the bar is proportional to the utility in the edit box. To change the utility, you can either enter a utility directly in the edit box or use the mouse to adjust the length of the alternative's bar. To adjust the bar length with the mouse, drag the end of the bar. Click on the "Done" button when the utilities are correct to save them. Common Units for Measures With Labels Because labels provide a discrete rather than continuous scale for measure levels, some of the assessment methods described above are inappropriate. In particular, the SUF and AHP SUF assessment methods are not available for measures with labels. The three remaining methods are Direct Entry, the Analytic Hierarchy Process, and Adjusted AHP. Each of these methods is performed in the way described above except that the assessments are done on the list of labels rather than on the alternatives directly. The utility for each label is then applied to all the alternatives that have that label. 7-22 Section 7 -- Using LDW 2: Assessing
Assessing Weights The weights in a preference set define the relative importances of the measures and goals in your analysis. Technically, they form the scaling constants for the Multi-measure Utility Functions (MUFs) that LDW uses to compute the utilities for the alternatives on the goals. The process for assessing weights in LDW consists of first identifying the goals that will have their own MUFs, selecting an assessment method and completing the assessment process for each goal. Selecting Goals With a MUF LDW lets you select which goals in the analysis will have their own utility function (MUF) and which will not. The only goal required to have a MUF is the "Overall" goal. If the "Overall" goal did not have a MUF it would not be possible to compute an overall ranking of the alternatives. If a goal does not have a MUF, LDW includes all of its members in the assessments for the next higher level goal. In the extreme case, only the "Overall" goal will have a MUF. Then, LDW will include all of the measures in the analysis in a common pool under the "Overall" goal when you assess weights. At the other extreme, each goal will have its own utility function. Then, only the measures and goals directly underneath each goal will appear in the weight assessment for the goal. This approach lets you "compartmentalize" and simplify the weight assessments by reducing the number of members that need to be considered at once. It also lets you use different weight assessment methods for different goals, and to compute interactions for different goals. The measures in an LDW analysis always appear in exactly one MUF. Usually the MUF is a weighted average of the utilities of the measures and sub-goals included in the MUF. You can see LDW which goals will have their own MUF in the properties dialog box for the active preference set. You can use Section 7 -- Using LDW 2: Assessing 7-23
- Page 90 and 91: If you check the Show Assessment St
- Page 92 and 93: saves it for later pasting. When yo
- Page 94 and 95: You can create a new Matrix view by
- Page 96 and 97: The quick entry view shows the alte
- Page 98 and 99: Structuring Goals The goals in an L
- Page 100 and 101: these two fields to describe each m
- Page 102 and 103: the hierarchy. In the Matrix view,
- Page 104 and 105: ! Point Estimate -- use a single nu
- Page 106 and 107: Figure 6-12. Example of a measure l
- Page 108 and 109: Figure 6-14. Example of a measure l
- Page 110 and 111: pass, LDW replaces each probabilist
- Page 112 and 113: Figure 6-17. Dialog box for definin
- Page 114 and 115: Figure 6-18. Measure Category Dialo
- Page 117: S E C T I O N Using LDW 2: Assessin
- Page 120 and 121: measure utility functions for the g
- Page 122 and 123: information as possible when you ch
- Page 124 and 125: measures with categories require mu
- Page 126 and 127: The "Reset" button deletes any asse
- Page 128 and 129: You can change the shape of the cur
- Page 130 and 131: Figure 7-4. Utility Assessment Scre
- Page 132 and 133: very different from the average of
- Page 134 and 135: Figure 7-6. Assessment matrix for A
- Page 136 and 137: You can, however, leave the assessm
- Page 138 and 139: properties dialog box can be select
- Page 142 and 143: options in the Hierarchy menu to ad
- Page 144 and 145: The check box labeled "Allow Repres
- Page 146 and 147: Next you will see a tradeoff assess
- Page 148 and 149: The Tradeoff::Use Alternatives to S
- Page 150 and 151: Figure 7-13. Example of Direct Entr
- Page 152 and 153: You can think of the importance num
- Page 154 and 155: Figure 7-15. Assessment Screen for
- Page 156 and 157: When you have selected two members
- Page 158 and 159: ("importance strength") that best d
- Page 160 and 161: clicking on the "Initialize" button
- Page 162 and 163: Set a Small k. The Enter Small k op
- Page 164 and 165: select the tradeoff you would like
- Page 166 and 167: Figure 7-18. Effects of consistency
- Page 169 and 170: Using LDW 3: Reviewing Results Intr
- Page 171 and 172: The curve shows how the utility fun
- Page 173 and 174: The tradeoff graph has one measure
- Page 175 and 176: When you select the option, you are
- Page 177 and 178: the relative weights of the "Price"
- Page 179 and 180: epresents a computer alternative wi
- Page 181 and 182: Figure 8-11. Example of Review::Ass
- Page 183 and 184: e true even if the measure has a ve
- Page 185 and 186: an analysis are included in exactly
- Page 187 and 188: Graph Weights The Graph Weights dis
- Page 189 and 190: Figure 8-16. Results::Rank Alternat
the same level. LDW provides a graphical method for directly<br />
entering the utilities. When you select this method, LDW displays<br />
a screen like the one in Figure 7-10.<br />
Figure 7-10. Direct Entry assessment screen.<br />
In this screen, each alternative is represented by its name, its<br />
level, an edit box and a bar. The length of the bar is proportional<br />
to the utility in the edit box.<br />
To change the utility, you can either enter a utility directly in the<br />
edit box or use the mouse to adjust the length of the alternative's<br />
bar. To adjust the bar length with the mouse, drag the end of the<br />
bar.<br />
Click on the "Done" button when the utilities are correct to save<br />
them.<br />
Common Units for Measures With Labels<br />
Because labels provide a discrete rather than continuous scale for<br />
measure levels, some of the assessment methods described above<br />
are inappropriate. In particular, the SUF and AHP SUF<br />
assessment methods are not available for measures with labels.<br />
The three remaining methods are Direct Entry, the Analytic<br />
Hierarchy Process, and Adjusted AHP. Each of these methods is<br />
performed in the way described above except that the<br />
assessments are done on the list of labels rather than on the<br />
alternatives directly. The utility for each label is then applied to<br />
all the alternatives that have that label.<br />
7-22 Section 7 -- Using LDW 2: Assessing
Change language