Method for assessing the mechanical performance levels of a switching device comprising at least one pole, each pole comprising: - a pair of contacts (12, 14) that are mobile relative to one another between an open position and a closed position; - a support arm of a first contact; - a driving mechanism for driving the support arm comprising: - a rotary shaft of the poles and at least one rod which pivotingly couple the driving mechanism to the support arm, - an energy accumulator system capable of driving a displacement of said arm to place the contacts (12, 14) in a closed position; method, characterized in that it consists in: - measuring the angle of rotation (θ) of the shaft of the poles for a duration of closure of the contacts (12, 14); - determining a first specific value equal to a first time (T 0) necessary to reach a first point of inflection on a curve of change (S θ) of the angle of rotation (θ), said point of inflection corresponding to the moment when the shaft of the poles reaches a maximum rotation speed; - determining a second specific value equal to a second time (T 1) necessary to reach a point on the curve of change (S θ) of the rotation angle (θ), corresponding to a theoretical final rotation angle (θ final) reached when the pair of contacts (12, 14) is in a closed position; - comparing said specific values to a switching device-specific initial operation template; - diagnosing the mechanical wear performance levels of the driving mechanism according to a comparative state between the specific values obtained and those of the operation template. - a pair of contacts (12, 14) that are mobile relative to one another between an open position and a closed position; - a support arm of a first contact; - a driving mechanism for driving the support arm comprising: - a rotary shaft of the poles and at least one rod which pivotingly couple the driving mechanism to the support arm, - an energy accumulator system capable of driving a displacement of said arm to place the contacts (12, 14) in a closed position; - a rotary shaft of the poles and at least one rod which pivotingly couple the driving mechanism to the support arm, - an energy accumulator system capable of driving a displacement of said arm to place the contacts (12, 14) in a closed position; - measuring the angle of rotation (θ) of the shaft of the poles for a duration of closure of the contacts (12, 14); - determining a first specific value equal to a first time (T 0) necessary to reach a first point of inflection on a curve of change (S θ) of the angle of rotation (θ), said point of inflection corresponding to the moment when the shaft of the poles reaches a maximum rotation speed; - determining a second specific value equal to a second time (T 1) necessary to reach a point on the curve of change (S θ) of the rotation angle (θ), corresponding to a theoretical final rotation angle (θ final) reached when the pair of contacts (12, 14) is in a closed position; - comparing said specific values to a switching device-specific initial operation template; - diagnosing the mechanical wear performance levels of the driving mechanism according to a comparative state between the specific values obtained and those of the operation template.