Abstract: A system analyzes behavior data obtained by measuring behaviors of a plurality of target persons, and based on a result of the analysis, defines a stage indicator, which is an indicator as a criterion of a plurality of stages via which a behavior as a target of habituation is aimed at step by step, and each of the plurality of stages following the stage indicator. For each pair of adjacent stages, the system identifies a gap between two stages constituting the pair. For each stage pair, the system identifies a reason/measure that is at least one of a reason for existence of the identified gap and a measure for causing a target person belonging to a lower stage to make a behavior change to shift to a higher stage, from relationship information in which a relationship between the gap and the reason/measure is defined.