Abstract : Safran Aircraft Engines designs and produces engines for commercial and military aircrafts. In the aeronautics industry, every produced part is really expensive. Consequently, the parts shall not be measured only when they are complete. For that reason, some specifications are verified at several intermediate stages of manufacturing. These specifications are called manufacturing specifications.
Manufacturing transfer is the activity of determining the manufacturing specifications. With this PhD, Safran Aircraft Engines wants a manufacturing transfer method to be proposed. This method shall be automated in a software. The software inputs shall come from the digital environment of the company.
In order to address this issue, PITOL (Production and Intermediate TOLerancing) and DMPITOL (Deviation Model for PITOL) are proposed. A manufacturing transfer method has been developed. It enables one to efficiently realize specification synthesis, tolerance analysis and tolerance optimization. Then the method is automated in a software, so that it is useable in industry.
In order to ease the use of the method by Safran Aircraft Engines, some rules are proposed which make possible the calculation of manufacturing transfer for two specific processes. Moreover solutions are proposed to make the method suitable with the industrialization process.

Key words : 3D Manufacturing Transfer, ISO Tolerancing, Computer Aided Tolerancing