The method for machining a series of workpieces (21) via at least one machining jet includes the following steps: each workpiece (21) is associated with an identifier for uniquely identifying the workpiece, during the machining of a respective workpiece, the temporal characteristic of the machining jet is detected by at least one sensor (30), the detected temporal characteristic is evaluated so as to obtain at least one comparative value, and for detecting incorrect machining, the at least one comparative value is compared with at least one threshold value.