“…Second, in the stage of determining design tasks, the designer needs to be aware of the knowledge on social background, technology development, and cost control. Third, in the conceptual design stage, since this stage determines the final level of product innovation, which has great impact on the quality and cost of the product, 13,14 the designer should take into account a variety of design constraints and grasp every aspect of product design at the macroscopic level, including the knowledge of innovative design, scientific effects database, patent database, case database, domain knowledge, design standards, design specifications, comprehensive knowledge, and so on. Fourth, in the structural design stage, the designer needs to use the material selection, mechanical assembly, computeraided design (CAD) technology, and related design experience skillfully.…”