LEARNED MODEL GENERATION METHOD AND APPARATUS

First group data indicating a position of a first end surface of a first sheet material and second group data indicating a position of a second end surface of a second sheet material are acquired from an inspection machine, and information indicating whether or not a winding body has a defect, and which constituent of a sheet material supplier is a cause of the defect in a case where the winding body has the defect, on the basis of a positional relationship among continuous positions of the first end surface indicated by the first group data, continuous positions of the second end surface indicated by the second group data, and reference lines, is output to a display for maintenance.