After the model is designed on the last, it is transferred to the design office for virtual elaboration and projection on CAD. Thanks to this fundamental aid an exact evaluation and development of the model is possible, even in minimum detail. Thus the work of the pattern-maker becomes determining since, besides working in close contact with the designer, he also interacts with all the various divisions by proposing the ideal manufacturing solutions to obtain the best results. This is how the prototype is elaborated and from it later, the working procedure begins.