For examining a metal sheet processing operation, a method includes scanning a detection beam along a processed metal sheet by causing a relative movement between the detection beam and the processed metal sheet, during the scanning, determining a position of an edge of the metal sheet hole by monitoring the detection beam, determining, from the determined hole edge position, a geometric configuration of the metal sheet hole, performing a comparison of the determined geometric configuration of the metal sheet hole with a corresponding desired hole configuration; and then sending a signal indicating information about the metal sheet processing operation, based upon the comparison.