The aim of this thesis is to drastically change the method adopted for the selection of the Golden Pass test among several performed during the durability analysis of a vehicle in the STELLANTIS group. The Golden Pass is characterized as the test closer, fatigue wise, to the solicitations a vehicle would undergo in a period of its life; the test is then replicated in a more efficient way on the proving benches. In the durability analysis department of STELLANTIS, the fatigue prediction method which is commonly adopted is the level crossing one, which compromises the accuracy in prediction with the ease of reading the results.