One of the biggest uses of 3D printing is to develop accurate scalable models of a design or a product. These models are accurate representations of the final product to be created and can hence remove any obvious design flaws or problems. 3d printed models can also be used for stress testing and analysis. Therefore, before putting a particular design to mass production, creating 3d prototypes can be very helpful in eliminating flaws or problems with it. You can visit http://www.lady3d.com/xyzprinting-da-vinci/ in order to learn more about how you can create actual models and representations of a particular design.