3. Interpreting the definition drawing

The development of a routing begins with a geometric analysis of the definition drawing of the part to be produced. For example, the part shown in figure 8 includes numerous indications relating to the dimensions of the geometric entities and their dimensional tolerances such as 45° ± 1° or $\varnothing {12}_0^{+\mathrm{0,5}}$ , geometric tolerances such as location $\oplus$ or parallelism //, reference planes such as P, details on the interpretation of geometric elements such as axis XX ′ or axis...