Process for checking the state of wear of a suspension comprising the following steps: - a step of structural analysis (FEM) of the suspension with load data at a standard frequency; - a step of making a first sample of the suspension using data obtained in the previous step of structural analysis; - a test step of said first sample at the standard frequency in a testing machine in which accelerations and loads on different points of the suspension are measured; - a step of realization of a compound signal that simulates the road sign in which processing, normalization and filtering of said signal are carried out; - a step of simulation of the fatigue behavior of the suspension using as input the signal realized in the previous step of realization of a compound signal to create a mathematical model of the suspension; - a step of realization of the fatigue curves for different families of suspensions; - a step of realization of a second sample of the suspension with feedback data of the simulation step, said second sample of the suspension being made on the basis of the test on the first sample, using data obtained from the mathematical model of the optimized suspension, keeping in consideration the variation of the characteristics of the first sample that occur during the production step, wherein the second sample is a faulty damaged system, with a known level of damage, and is used to update the mathematical model of the suspension in real time; - a step of verification of the deviation of the fatigue values obtained in the simulation step from those measured for the second sample with a test in laboratory under constant frequency; - a validation step of the final fatigue curve carried out by causing the second sample to fail due to fatigue loads. - a step of structural analysis (FEM) of the suspension with load data at a standard frequency; - a step of making a first sample of the suspension using data obtained in the previous step of structural analysis; - a test step of said first sample at the standard frequency in a testing machine in which accelerations and loads on different points of the suspension are measured; - a step of realization of a compound signal that simulates the road sign in which processing, normalization and filtering of said signal are carried out; - a step of simulation of the fatigue behavior of the suspension using as input the signal realized in the previous step of realization of a compound signal to create a mathematical model of the suspension; - a step of realization of the fatigue curves for different families of suspensions; - a step of realization of a second sample of the suspension with feedback data of the simulation step, said second sample of the suspension being made on the basis of the test on the first sample, using data obtained from the mathematical model of the optimized suspension, keeping in consideration the variation of the characteristics of the first sample that occur during the production step, wherein the second sample is a faulty damaged system, with a known level of damage, and is used to update the mathematical model of the suspension in real time; - a step of verification of the deviation of the fatigue values obtained in the simulation step from those measured for the second sample with a test in laboratory under constant frequency; - a validation step of the final fatigue curve carried out by causing the second sample to fail due to fatigue loads. <EOS>