In several iterations (usually 1 to 3 validations) concepts, visual and interactive prototypes are evaluated and optimized regarding weak points and development potential. The focus is on technical and functional validity as well as on mental models and needs which underlie the product utilization. This understanding is advantageous in the product development as this information about the potential user is equally usable in the rage of feature of the product.
Through the early testing weak points are recognized and optimized more quickly. You gain valid products and services which show a great usability and are tailored to the user’s real needs.