Computer-aided method for assigning assemblies (LP1 - LP6) to component fitting lines (BL1 - BL6) for fitting the assemblies (LP1 - LP6) with components (B1 - B6) in order to achieve a minimal component variance for prescribed maximum utilization levels over time per component fitting line (BL1 - BL2), wherein the component variance is determined as the sum of the numbers of component types needed on the component fitting lines (BL1 - BL2), wherein an expected production time is ascertained for each assembly type of the assemblies (LP1 - LP6) to be fitted with components and each component fitting line (BL1 - BL2) taking into consideration the respective cycle time for the assembly type on the component fitting line (BL1 - BL2), the respective conversion times, the respective level of line use and the expected number of items to be produced per assembly type, wherein the actual number of items to be produced arises according to a previously determinable probability distribution, wherein the sum of these expected total production times must not exceed the maximum utilization level of the respective component fitting line (BL1 - BL2) over time for the set of assemblies (LP1 - LP6) that is assigned to a line (BL1 - BL2), wherein the possible assignments of assemblies (LP1 - LP6) to the component fitting lines (BL1 - BL2) are limited by the existing infrastructure or by user-defined presets, wherein the assignment is made such that for the probability distributions for the sum of the expected production times per component fitting line that result from the cited probability distributions for the numbers of items, the differences from the respective expected value of these resultant probability distributions are limited by a prescribable maximum threshold value, wherein a difference from the sum of the expected production times of a component fitting line is expressed as a variance thereof, which can be determined per component fitting line by the sum over all component types assigned to the component fitting line, from the product of the square difference from the expected number of items of a component type within a period of time and the associated values of the resultant probability distributions and with multiplication by the squared cycle time, and wherein the assignment of the assemblies (LP1 - LP6) to the component fitting lines (BL1 - BL1) is computed for the given presets by means of integer linear programming, wherein a weighted sum consisting of the component variance and the maximum difference from the sum of the expected production times is minimized. wherein the actual number of items to be produced arises according to a previously determinable probability distribution, wherein the sum of these expected total production times must not exceed the maximum utilization level of the respective component fitting line (BL1 - BL2) over time for the set of assemblies (LP1 - LP6) that is assigned to a line (BL1 - BL2), wherein the possible assignments of assemblies (LP1 - LP6) to the component fitting lines (BL1 - BL2) are limited by the existing infrastructure or by user-defined presets, wherein the assignment is made such that for the probability distributions for the sum of the expected production times per component fitting line that result from the cited probability distributions for the numbers of items, the differences from the respective expected value of these resultant probability distributions are limited by a prescribable maximum threshold value, wherein a difference from the sum of the expected production times of a component fitting line is expressed as a variance thereof, which can be determined per component fitting line by the sum over all component types assigned to the component fitting line, from the product of the square difference from the expected number of items of a component type within a period of time and the associated values of the resultant probability distributions and with multiplication by the squared cycle time, and wherein the assignment of the assemblies (LP1 - LP6) to the component fitting lines (BL1 - BL1) is computed for the given presets by means of integer linear programming, wherein a weighted sum consisting of the component variance and the maximum difference from the sum of the expected production times is minimized.