An analytic network process (ANP) storage memory stores an ANP weighted supermatrix representing an ANP model. A processor is in communication with the ANP storage memory. The processor fixes each one of plural nodes one at a time in the ANP model and measures a row sensitivity of each of the nodes as it is fixed, the row sensitivity being measured using one or both of (i) a predetermined increase value and (ii) a predetermined decrease value. Also, it scores how much synthesized alternatives scores found by doing ANP row sensitivity on each of the fixed nodes change from original values thereof, to generate a value indicating a change distance for each of the nodes. A same proportionality is maintained in the stored ANP weighted supermatrix as the fixed node is changed by the predetermined increase and/or decrease values.