Embodiments of apparatus, systems and methods facilitate performing on-demand cluster analysis on a multi-dimensional data set comprising a plurality of dimension members. In some embodiments, the method comprises: selecting a subset of the plurality of dimension members based on a current context associated with the multi dimensional data set; computing a plurality of dimensional scores for a plurality of dimension members in the selected subset, wherein each dimensional score is associated with a distinct dimension member and measures the dimensional influence of the associated dimension member on a metric associated with the multi-dimensional data set; and ranking the plurality of dimension members in the selected subset based on the dimensional score.