A method for optimization of subsequent treatment processes is developed. End products having end product data are generated from semi-manufactured products having semi-manufactured product data, and at least part of the semi-manufactured products are processed at least in three phases. The processing data for semi-manufactured products to be processed in the last phase are determined from the end product data, the processing data for the semi-manufactured products to be processed in the first phase are determined, the feasibility of the processing data for at least one intermediate phase is checked based on productive resources of the intermediate phase, and the optimal processing data for the first phase is determined and the processing data for the intermediate phase is generated.