Logical Decisions - Classweb

Figure 7-6. Assessment matrix for Analytic Hierarchy Process.
In this matrix, the rows and columns both represent alternatives.
The cells in the matrix represent the performance ratio of the row
alternative to the column alternative.
Since the ratio of an alternative to itself must be one, LDW does
not need to show the ratios on the diagonal of the matrix. Instead,
LDW uses the diagonal cells to show the current utility for each
alternative based on the assessment so far.
Initially, LDW assumes that all of the alternatives have equal
performance, so that all the ratios off the diagonal equal one.
To complete the assessment for the Analytic Hierarchy Process
method, you need to enter the ratio for each possible pair of
alternatives. This means you need to enter a ratio in each nondiagonal
cell in the matrix.
Since each pair appears twice in the matrix (once above the
diagonal and once below it), you only need to enter ratios for the
cells above the diagonal. LDW automatically enters the proper
ratio in the corresponding cell below the diagonal.
You enter the ratios between alternatives by highlighting the cell
you want to enter and typing in the appropriate ratio.
You can get help with this by double clicking the cell. When you
do this, you will see a dialog box like the one in Figure 7-7.
7-16 Section 7 -- Using LDW 2: Assessing