A method for examining the process capability of a screwed connection , wherein said screwed connection has been tightened with a tightening angle (α A ) under serial production conditions; characterized by the steps of: aaa) identifying, before executing step a), the screwed connection tightened under serial production conditions; and assigning, to the identified screwed connection , a known target tightening torque (M SOLL ) and a known target tightening angle (α SOLL ); aa) determining, before executing step a) and after executing step aaa), a predefined loosening angle difference (ω L ) for the identified screwed connection , said loosening angle difference (ω L ) being equal to the negative target tightening angle (α SOLL ) value plus a predefined loosening angle allowance (α Z ) ; a) loosening the screwed connection until the predefined loosening angle difference (ω L ) is obtained; b) measuring the obtained loosening angle difference (ω L ) ; measuring a loosening angle (α H ) obtained in step a); c) tightening the screwed connection with a predefined threshold torque (M S ) ; d) measuring a threshold angle (α S ) corresponding to the threshold torque (M S ) obtained; e) further tightening the screwed connection until the known target tightening angle (α SOLL ) is obtained; and f) measuring the test angle difference (ω P ) in the tightened state upon obtaining the target tightening angle (α SOLL ), said test angle difference (ω P ) being an angle difference between the holding angle (α H ) and the target tightening angle (α SOLL ). aaa) identifying, before executing step a), the screwed connection tightened under serial production conditions; and assigning, to the identified screwed connection , a known target tightening torque (M SOLL ) and a known target tightening angle (α SOLL ); aa) determining, before executing step a) and after executing step aaa), a predefined loosening angle difference (ω L ) for the identified screwed connection , said loosening angle difference (ω L ) being equal to the negative target tightening angle (α SOLL ) value plus a predefined loosening angle allowance (α Z ) ; a) loosening the screwed connection until the predefined loosening angle difference (ω L ) is obtained; b) measuring the obtained loosening angle difference (ω L ) ; measuring a loosening angle (α H ) obtained in step a); c) tightening the screwed connection with a predefined threshold torque (M S ) ; d) measuring a threshold angle (α S ) corresponding to the threshold torque (M S ) obtained; e) further tightening the screwed connection until the known target tightening angle (α SOLL ) is obtained; and f) measuring the test angle difference (ω P ) in the tightened state upon obtaining the target tightening angle (α SOLL ), said test angle difference (ω P ) being an angle difference between the holding angle (α H ) and the target tightening angle (α SOLL ). a) loosening the screwed connection until the predefined loosening angle difference (ω L ) is obtained; b) measuring the obtained loosening angle difference (ω L ) ; measuring a loosening angle (α H ) obtained in step a); c) tightening the screwed connection with a predefined threshold torque (M S ) ; d) measuring a threshold angle (α S ) corresponding to the threshold torque (M S ) obtained; e) further tightening the screwed connection until the known target tightening angle (α SOLL ) is obtained; and f) measuring the test angle difference (ω P ) in the tightened state upon obtaining the target tightening angle (α SOLL ), said test angle difference (ω P ) being an angle difference between the holding angle (α H ) and the target tightening angle (α SOLL ). <EOS>