Quick study models are essential to understand potential in an idea, in ideation phase. Volumetric Foam/Composite mock-ups to help visualize concept made on paper, it gives better understanding of concept and reduces decision making time as well.
Final working prototype with all parts made as per design, assembled, and tested for its working gives confidence to investors for Tooling and production further. Latest 3D printing technology gives very precise replicas of designs, it also saves huge time and cost.