Summarization: The reduction of development time and cost is a very important task in manufacturing industry. We evaluate a CAD/CAE application for automating the whole design process. The process is modelled using Top-Down design methodology and skeleton models. Product design depends on limited input parameters, obtained from product specification and customer needs. Using parametric design, the 3-D solid model of the product assembly, the drawings, the customised BOM for all subsystems, and the G-Codes for all sheet metal parts are automatically calculated. The new methodology significantly contributes to the complete automation of the design. The superiority of the proposed methodology is obvious comparing with the existing 2-D design m...