Abstract: To calculate expected damage as a result of natural catastrophe events (5) on a multiplicity of insured objects, a plurality of processor units (31, 31?, 31?), are respectively provided with different instruction data comprising details related to at least one portion of the insured objects and their association with a risk type and a geographical risk area for a risk group (L2). The processor units are controlled such that they respectively calculate elemental damage details for the expected damage as a result of one of the natural catastrophe events on the basis of the instruction data provided for them and a damage sensitivity function determined by virtue of the association of the insured objects with a risk type and a geographical risk area. The damage sensitivity functions can be determined and made available directly in the processor units, and the total computation time can be reduced.