In this paper, we proposed a simulation model in order to predict the fixture selection in a toilet room, as follows. (1) The authors intoroduced the Analytic Hierarchy Process (AHP) and the Fuzzy-AHP (F-AHP) to analyze the behavior of the fixture selection for use. (2) In using Fuzzy integral, decision makers were classified into three types, which were additive, superadditive, and subadditive groups. (3) In additive case, fixture selection behavior was analyzed by AHP. And in nonadditive case, which is superadditive or subaddilive, they were analyzed by F-AHP. Then, we proved the proposed model was efficient to design the fixture arrangement by simulation analysis.
