Abstract
The Analytic Hierarchy Process (AHP) is a method for decision making
which includes qualitative factors. In this method, ratio scales are ob-
tained from ordinal scales which are derived from individual judgments
for qualitative factors using the pairwise comparison matrix. The An-
alytic Network Process (ANP) also uses a pairwise comparison matrix
to obtain ratio scales. The di®erence between these two methods ap-
pears in modelling the problem and computing the ¯nal priorities for
the alternatives from ratio scales previously obtained. This paper gives
a brief look at the foundation of AHP and ANP. Furthermore, an illus-
trative example is given for ANP.