Abstract: A system for supporting an overall product design process including design of machining processes. Machined portion models, each including solid shape and/or machining attribute data of a machined portion defined in the machined portion model, are prepared on a machining operation basis and stored in a library. The library is provided as a standard machined portion library. A design engineer designates the machined portion models to be applied to a product model, which is a solid model displayed on a CAD apparatus, and specifies application positions and application directions thereof. Based on this designation, the CAD apparatus finds a product model representing a product shape formed after the machining operations, each corresponding to the selected machined portion models are completed. By sequentially applying the machined portion models to a blank material model of a blank material of the product, the product model is generated.

Abstract: A system which facilitates generation of a drawing for machining instruction is provided. Unit process model information concerning a unit process model which can be machined using a single tool is used to define a product model. The unit process model information includes information concerning the shape and machining property of a machined portion. A combination of the unit process model information and disposition information for a machined portion constitutes machining step information indicating a single machining operation. When machining information formed by providing the machining step information according to an actual machining sequence is combined with a blank material model which is the subject of the machining, a product model including the final product shape and machining information can be obtained.