generating, by the machine, material data for at least one material to be used for printing a 3D object, the material data being based, at least in part, on a material characteristic requirement, wherein the material characteristic requirement is based, at least in part, on one of electric characteristic or mechanical characteristic of the at least one material;

designing, by the machine, the 3D object based, at least in part on the material data, wherein designing the 3D object comprises designing a 3D outer shape based on 3D modeling data of the 3D object, obtaining component data of a component object and connection data of a connection relationship between the component objects by analyzing an electric schematic through a 3D schematic convert method, arranging the component objects into the 3D outer shape on the basis of the component data, and designing a connection part between the component objects disposed in the 3D outer shape on the basis of the connection data;

performing, by the machine, a simulation on the 3D object designed on the basis of the material data; and

generating, by the machine, the 3D printing data for performing 3D printing on the 3D object on the basis of an evaluation criterion and a result of the simulation.