To support analyzing added values desired by target generations in addition to added values desired by other generation based on a plurality of future scenarios before starting product development.

Variable values of the target generation are estimated based on a first hypothesis and recorded in a variable value DB 6. The variable values of the target generation are estimated based on a second hypothesis and recorded in the variable value DB 6. Further, variable values of other generations are estimated based on the second hypothesis and recorded in the variable value DB 6. When the variable values are displayed on a monitor 3a, analysis for determining whether other generations purchase the developed product or not can be supported even if a future scenario is not based on the first hypothesis but on the second hypothesis.