2d drawing and 3d modelling are important for any design, it is a blueprint to build great products, 2d drawings include sketch plans such as floor plans, elevation 2d plan, detail views for specific data visualization, section view for detailing specific area, overall space plan provide by 2d drawings to build great models.
3D modelling is important for all kind of industries such as architectural, structural, industrial and commercial product design. Because 3d model visualize real product look and style, it enables to determine product feeling such appearance, style and 3d space, how product can fit in real 3 dimension.
Most using product assembly in product design industry, parts and sub-assemblies can be assembled together to create final great 3d models. 3D models help to create great renderings that show real appearance of the product or it can be architectural renderings to show real architectural visualization and interior design of a building models.