It can be realized in two forms: Enlarged or to scale.
The enlarged ones are used to evaluate the product concept, see the imperceptible details of this product in real scale, as well as a marketing tool and for demonstrations. To realize this process we have specific machinery.
The to scale models, serve for clinical trials or studies, where the physical qualities and materials are tested. They are made with manufacturing machinery under strict quality controls.
Physical expression of the design plan.