Abstract: Upon executing a computer program for supporting project planning of a new model vehicle by a computer, information indicating feasibility of a new model vehicle that satisfies target specification and performance data, which are set by the operator, is calculated on the basis of specification information and performance information of a plurality of existing vehicles stored in a database, and the calculation result is provided to the operator. The calculation result contains information associated with the degree of achievement of the set target specification data and/or target performance, information associated with suggestions for improving feasibility of the new model vehicle, and the like, in addition to the information indicating the feasibility of the new model vehicle.