Method for producing individual dosing quantities of a powdery product by means of a roller doser, wherein the roller doser comprises a powder supply, a dosing roller and a measuring device for the quantisation of the dosing quantity, wherein the dosing roller is provided with at least one dosing opening at its circumference, wherein the dosing opening is bounded by means of a filter element on the inside and can be subjected to a vacuum through the filter element, and wherein the method comprises the following steps: - in a filling position the dosing opening is filled from the powder supply with a sub-quantity of the powdery product; - in the filling position the dosing opening is subjected to a vacuum through the filter element, wherein a dosing quantity of the powdery product is formed in the dosing opening; - the dosing roller is rotated until the dosing opening filled with the dosing quantity is in an ejection position, in which the dosing quantity is ejected from the dosing opening; - the dosing roller is rotated further until the emptied dosing opening is once again in the filling position; - the above steps are repeated cyclically several times, wherein the individual masses of several ejected dosing quantities are sequentially determined by means of the measuring device; - from the determined individual masses of the several ejected dosing quantities, a mass average value is formed, compared to a preset internal set mass range and used as follows for a trend control: - if the formed mass average value lies within the preset internal set mass range, the level of the vacuum acting on the dosing opening in the filling position remains unchanged, and the above formation of a mass average value begins again; - if the formed mass average value lies outside the preset internal set mass range, an adapted vacuum is determined in such a way that, if the mass average value is too low, the level of the vacuum is increased and, if the mass average value is too high, the level of the vacuum is reduced, and the dosing opening is subjected to the adapted vacuum in the filling position. - in a filling position the dosing opening is filled from the powder supply with a sub-quantity of the powdery product; - in the filling position the dosing opening is subjected to a vacuum through the filter element, wherein a dosing quantity of the powdery product is formed in the dosing opening; - the dosing roller is rotated until the dosing opening filled with the dosing quantity is in an ejection position, in which the dosing quantity is ejected from the dosing opening; - the dosing roller is rotated further until the emptied dosing opening is once again in the filling position; - the above steps are repeated cyclically several times, wherein the individual masses of several ejected dosing quantities are sequentially determined by means of the measuring device; - from the determined individual masses of the several ejected dosing quantities, a mass average value is formed, compared to a preset internal set mass range and used as follows for a trend control: - if the formed mass average value lies within the preset internal set mass range, the level of the vacuum acting on the dosing opening in the filling position remains unchanged, and the above formation of a mass average value begins again; - if the formed mass average value lies outside the preset internal set mass range, an adapted vacuum is determined in such a way that, if the mass average value is too low, the level of the vacuum is increased and, if the mass average value is too high, the level of the vacuum is reduced, and the dosing opening is subjected to the adapted vacuum in the filling position.