In the AHP the process starts with dividing the problem
into a hierarchy model of issues which should be considered
in the work. These hierarchical orders help to simplify the
illustration of the problem and bring it to a condition which is
more easily understood. In each hierarchical level the weights
of the elements are calculated. The final goal is achieved by
considering the weights of criteria and alternatives.
Based on the AHP analysis, the weights of impedance
factors can be calculated for further processing. The procedure
for using the AHP can be summarized as [32]:
1) Model the problem as a hierarchy containing the decision
goal, the alternatives for reaching it, and the criteria
for evaluating the alternatives.
2) Establish priorities among the elements of the hierarchy
by making a series of judgments based on pairwise
comparisons of the elements.
3) Synthesize these judgments to yield a set of overall
priorities for the hierarchy.
4) Check the consistency of the judgments