A segmentation management system manages segmentation of a set of members in a multi-dimensionally modeled data source. The segmentation management system comprises a segment definition manager, a segmentation engine and a segment application manager. The segment definition manager manages definitions of identifiable non-overlapping segments for a given base set of members in a multi-dimensionally modeled data source. The segmentation engine divides the base set of members into the segments based on the definitions of the segments. The segment application manager allows the segments to be used as objects.