Modeling and prototyping are integral to the design and manufacturing process in many industries. Prototypes tend to be actual versions of the intended product, containing both the complete interior and exterior. They are used to learn something about a proposed system or product during the initial stages of development to mitigate the cost of discovering design errors later on. A model is a representation of the final product consisting of an arrangement of parts that serve to demonstrate the way the item will look like. Models can come in many shapes, sizes and styles and are commonly used for display.