Abstract
Abstract In designing a product, the product specifications are developed first, which conceptually constrains the geometry and functions of the product. Subsequently, its components are designed with the form in mind and achieve the functional requirements according to the specifications required. Conventional CAD systems are made for generating the geometric form of a part. This is meant to take the place of manual drafting. However, a system such as the one described above is incapable of capturing the non-geometric aspects of the designer's intent in a form that can be used for automatic process planning. The result is that tolerance, parts relationships, surface finish, etc. cannot be specified by the designer in the CAD environment unless some form of annotation is provided for. Product Modeller (ProMod) provides a concurrent product design environment for designers to assign the product specifications onto the parts' nominal geometry through a spatial relationships engine. With this information, th...
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