Computer system for automatically producing a filter unit comprising a plurality of components or elements, which includes a memory unit, an evaluation unit, an input unit and an output unit, wherein the input unit has means for selecting (step 33) a field of application (C1) of the filter unit to be produced from among a plurality of predefined or predefinable fields of application and/or means for selecting (step 34) a design (C2) of the filter unit to be produced from among a plurality of predefined or predefinable designs;
- wherein the evaluation unit has means for generating (steps 35-40) an input field (P) on the display device as a function of the selection made, wherein only those inputs are enabled in the input field (P) which correspond to the selection made (step 33, step 34), wherein the evaluation unit further comprises means for checking (step 81) whether the entries made in each input field (P) are mutually compatible, i.e., by retrieving or calling datasets that correspond to the entries and are stored in a database or a data memory area, and wherein the evaluation unit further has means for automatically generating (step 82) an error message (F) if the entries made in each input field (P) are not mutually compatible.