Copilot Pro® is a method for the initial and regular machine-tools setup,developed by the Symme laboratory of the Savoy University and by the TechnicalCenter of Industries of Screw-machining (Ctdec) in France. Its first step is theorganization of the different machining operations, in setup steps, themselves subdividedinto measuring steps. The second step consists in determining the manufacturing dimensionsto measure at the end of each measuring step. Finally, the third step consists in linkingthe manufacturing dimensions to both the correctors and the tool-dimensions, in the aim ofcalculating the corrections that have to be done in function of the deviations measured onthe manufacturing dimensions. With this method, the steering of an industrial workpiece isperformed with two steering parts instead of ten before.