It is everyday stronger the relationship between esthetic-functional design and performance during the consideration of the final development of an object. Nowadays it is frequent that the outward appearance is put in front, although it does not mean that the mechanical aspects and resistance of the part designed are abandoned. Our experience and technical capabilities, our own ones and those of our sector suppliers as well, are leading us more and more to participate in the final stage of development, previous to production, to search the adaptation of the designed object to the technical condition that makes possible its manufacture.