In a die board for cutting andor creasing sheet-type work material, a base is provided that includes a first upper surface and a second lower surface. The active areas and the element isolation areas are arranged alternately in a first direction. The method further includes defining an observation window for the at least one characteristic variable within which the at least one characteristic variable is assumed to be steady-state and identifying an implausible value, which is not caused by the battery, for the at least one characteristic variable if the scatter of the at least one characteristic variable exceeds a defined scatter limit.