Logical Decisions - Classweb

! Identify Outliers — Highlights those ratios that differ
most from the ratios computed by LDW based on
the utilities displayed on the diagonal of the AHP
matrix. When you select this option, LDW will ask
you how many outliers to highlight and will
redraw the matrix with that number of cells
highlighted in red.
Common Units Using Adjusted AHP
The Analytic Hierarchy Process method for converting to
common units has the property that the computed utilities for the
alternatives sum to 1.0. This may pose a problem when
combining the Analytic Hierarchy Process with other methods
which range from 0.0 (worst) to 1.0 (best). To remedy this
problem, LDW provides an alternate assessment method -- called
Adjusted AHP -- which adjusts the computed AHP utilities so
that they range from 0.0 (worst) to 1.0 (best). This adjustment is
the only difference between the two approaches. The adjusted
utilities appear on the assessment matrix diagonal during the
assessment process, which is otherwise exactly the same as for the
Analytic Hierarchy Process method.
Common Units Using AHP SUFs
The Analytic Hierarchy Process and Adjusted AHP approaches
described above require that you include every alternative in the
matrix. This makes the assessment requirements excessive for
problems with more than a few alternatives. In addition, there is
no link between the ratios assessed and the levels for the
alternatives on the measure. For these reasons, LDW provides an
alternate approach called "AHP SUFs." The AHP SUFs method
lets you develop an AHP matrix for just some alternatives. LDW
uses the utilities computed from the matrix as the basis for a
single measure utility function. LDW can then use this SUF to
rank all of the alternatives. Note that -- unlike the traditional
Analytic Hierarchy Process method -- the AHP SUFs method
requires you to define a level for each alternative on the active
measure.
When you select the "AHP SUF" method in the common units
dialog box and click "Assess," LDW first asks you to select a set of
alternatives to use in the matrix. Just click on the alternative
names to select and highlight them. Only alternatives whose
levels are within the range defined in the active measure's
Section 7 -- Using LDW 2: Assessing 7-19