A response surface can be built with reduced analysis time and shortened time for objective value calculation using the response surface. To achieve this, a connection information generating unit divides data of a machine structure constituting an analysis target into a plurality of parts via an input unit, and parameterizes a distribution of a physical quantity at a connection boundary thereof so as to be given and received as a parameter of a physical quantity of adjacent divided shape data. A response surface generating unit parameterizes a response surface based on the parameterized distribution of the attribute value.