Logical Decisions - Classweb

("importance strength") that best describes the ratio of importance
of the better performing member to the other member. You may
find the descriptions associated with the odd numbered ratios
helpful in doing this. Once you have selected an ordering and an
importance ratio, click OK and LDW will enter the proper ratio in
the active cell.
After you have entered a weight ratio, LDW uses the AHP
computation process to compute a new set of weights for the
members. LDW shows the computed weights in the diagonal
cells.
If you have checked the AHP::Estimate Ratios option has been
checked, LDW also estimates the weight ratios for cells you have
not yet entered and displays them. LDW marks cells where you
have entered weight ratios in blue. Your assessment will be
complete when all the non-diagonal cells in the matrix are
marked in blue. You can, however, leave the assessment process
at any time. The weights for the members will be computed
based on the ratios you have entered to that point. Just click the
"Done" button when you have completed your assessments.
The AHP process collects more preference judgments than are
required to compute a set of weights. Thus, some judgments are
likely to be inconsistent. LDW represents the degree of
inconsistency by the numbers in the upper left corner of the
matrix. The number labeled "C.I." is the "Consistency Index" for
the matrix. It is an absolute measure of the consistency of the
ratios in the matrix. The number labeled "C.R." is the consistency
ratio and is a relative measure of consistency. The developers of
the AHP approach suggest that C.R.s above 0.10 suggest that you
should adjust the matrix to make it more consistent.
AHP Method Options. When you are assessing weights using
the AHP method, the AHP menu item appears in the main menu
bar. The options in this menu item are described on page 7-18.
Changing Assessment Methods
A powerful feature of LDW is its ability to convert from one
assessment method to another with little loss of preference data.
Thus, you could first use the "Smarter" method to get a
preliminary set of weights, change the assessment method to
"Smart" and see an initial set of swing weights based on the
smarter weights. Or, you could assess an AHP matrix and then
switch to the tradeoff approach. LDW will compute a set of
7-40 Section 7 -- Using LDW 2: Assessing