1. A segmentation management system for managing segmentation of a set of members in a multi-dimensionally modeled data source, the segmentation management system comprising: a segment definition manager for managing definitions of identifiable non-overlapping segments for a given base set of members in a multi-dimensionally modeled data source, a segmentation engine for dividing the base set of members into the segments based on the definitions of the segments; and a segment application manager for allowing the segments to be used as objects.