Logical Decisions - Classweb
Logical Decisions - Classweb Logical Decisions - Classweb
clicking on the "Initialize" button. LDW will ask you to confirm before it initializes the interactions. The status line above the interaction assessment method tells you how much of the assessment you have completed. A status of "Defaults Used" shows that you haven't done any interactions assessments for the active goal or that you have initialized the interactions for the goal. A status of "Assessment Complete" shows that you have completed all of the needed assessments for the selected method. You can still go back and review or make changes by clicking the "Assess" button even if the status says "Assessment Complete." No Interactions. The "No Interactions" method forces the active goal's MUF to be the weighted sum of the utilities of the active members. An Additional Tradeoff. The "Additional Tradeoff" method lets you define the MUF formula by assessing a second tradeoff for two active members. You begin this method by selecting it and clicking the "Assess" button. When you do this, LDW asks you to select two of the active members to use in the second tradeoff. If you are using the "tradeoff" or "pairwise weight ratios" weight assessment method LDW shows you a list of the tradeoffs for the active goal. LDW then shows you a tradeoff assessment screen like the one in the "tradeoff" weight assessment method described on page 7- 26. Typically, the second tradeoff will include one hypothetical alternative with levels at the extremes of the measures' ranges and one with levels in the middle of the measures' ranges. LDW will let you move both members as in the Tradeoff::Allow Free Float option to do this. For example, suppose measures m1 and m2 both range from 0 to 1 with straight line SUFs and an initial tradeoff of (m1 = 0, m2 = 1) equally preferred to (m1 = 1 and m2 = 0) that implies the measures have equal weights. If a second tradeoff of (m1 = 0, m2 = 1) equally preferred to (m1 = .5 and m2 = .5) 7-42 Section 7 -- Using LDW 2: Assessing
is defined, an additive MUF formula is implied. If a second tradeoff of (m1 = 0, m2 = 1) equally preferred to (m1 = .3 and m2 = .3) is defined, destructive interaction, where a low utility on one measure leads to a low overall utility, is implied. If a second tradeoff of (m1 = 0, m2 = 1) equally preferred to (m1 = .7 and m2 = .7) is defined, constructive interaction, where a high utility on one measure leads to a high overall utility, is implied. Probability Method. The "Probability" method lets you define the MUF Formula for the active goal by answering a probabilistic question about two active members. When you select the method and click the "Assess" button, LDW asks you to select two of the active members to use in the probability method assessment. If you are using the "tradeoff" or "pairwise weight ratios" weight assessment method, LDW shows you a list of the tradeoffs defined for the active goal. Then LDW shows you two simplified alternatives involving the selected members. The first alternative is an equal chance of A) having the first member at its best level and the second member at its worst or B) having the first member at its worst level and the second member at its best. The second alternative is a probability of P of having both members at their best level and a probability (1 - P) of having both members at their worst level. See Figure 9-16 on page 9-61 for an example of these alternatives. LDW asks you to identify the probability P that makes the two alternatives equally preferred. In the first alternative the members compensate for one another. The second is all or nothing. If the two members don't interact strongly, the alternatives should seem the same and P should be 0.5. If the members interact destructively, where a low utility on one member makes an alternative undesirable, P will be between 0.0 and 0.5. If the members interact constructively, where a high utility on only one member is needed to make an alternative desirable, P will be between 0.5 and 1.0. Section 7 -- Using LDW 2: Assessing 7-43
- 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 140 and 141: the same level. LDW provides a grap
- 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 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
- Page 191 and 192: Figure 8-18. Dialog box for Results
- Page 193 and 194: You can use the measure equivalents
- Page 195 and 196: simulation for each alternative usi
- Page 197 and 198: Sensitivity Graphs Sensitivity grap
- Page 199 and 200: You can view a sensitivity table by
- Page 201 and 202: Figure 8-28. Example of Results::Sc
- Page 203 and 204: Figure 8-30. Example of Results::Sc
- Page 205 and 206: In the dialog box, you are asked to
- Page 207 and 208: Figure 8-34. Dialog box for Results
- Page 209 and 210: Graph an Alternative The graph an a
clicking on the "Initialize" button. LDW will ask you to confirm<br />
before it initializes the interactions.<br />
The status line above the interaction assessment method tells<br />
you how much of the assessment you have completed. A status<br />
of "Defaults Used" shows that you haven't done any interactions<br />
assessments for the active goal or that you have initialized the<br />
interactions for the goal. A status of "Assessment Complete"<br />
shows that you have completed all of the needed assessments for<br />
the selected method. You can still go back and review or make<br />
changes by clicking the "Assess" button even if the status says<br />
"Assessment Complete."<br />
No Interactions. The "No Interactions" method forces the active<br />
goal's MUF to be the weighted sum of the utilities of the active<br />
members.<br />
An Additional Tradeoff. The "Additional Tradeoff" method lets<br />
you define the MUF formula by assessing a second tradeoff for<br />
two active members.<br />
You begin this method by selecting it and clicking the "Assess"<br />
button. When you do this, LDW asks you to select two of the<br />
active members to use in the second tradeoff. If you are using<br />
the "tradeoff" or "pairwise weight ratios" weight assessment<br />
method LDW shows you a list of the tradeoffs for the active goal.<br />
LDW then shows you a tradeoff assessment screen like the one<br />
in the "tradeoff" weight assessment method described on page 7-<br />
26. Typically, the second tradeoff will include one hypothetical<br />
alternative with levels at the extremes of the measures' ranges<br />
and one with levels in the middle of the measures' ranges. LDW<br />
will let you move both members as in the Tradeoff::Allow Free<br />
Float option to do this.<br />
For example, suppose measures m1 and m2 both range from 0 to<br />
1 with straight line SUFs and an initial tradeoff of<br />
(m1 = 0, m2 = 1) equally preferred to (m1 = 1 and m2 = 0)<br />
that implies the measures have equal weights. If a second<br />
tradeoff of<br />
(m1 = 0, m2 = 1) equally preferred to (m1 = .5 and m2 = .5)<br />
7-42 Section 7 -- Using LDW 2: Assessing