Abstract
Traditionally, preference ranking of the commodity is a frequency order. However, ambiguous answers with contradictions of human beings has almost never been studied. Therefore, we have tried to analyze the sequence of ambiguous answers to the decision makers by Interval AHP. As a result, the higher ranking is almost finalized and from middle ranking to lower ranking was not fixed in the case of color of automotive exterior and interior. Contradiction that order cannot be determined was less in the case of modeling of automotive wheels.