2) Pairwise Comparison: In the AHP method, obtaining
the weights or priority vector of the alternatives or the criteria
is required. For this purpose Saaty (1980) has used and developed
the Pairwise Comparison Method (PCM) [32]. After the
hierarchy was created, comparing the alternatives or criteria in
the hierarchy, and defining their importance over each other
are done using the PCM. Here a system of numbers to indicate
how much one criterion is more important than the other, was
employed and listed in Table I [32].