An embodiment of a method includes selecting call detail report (CDR) call setup attributes from captured CDR data, refining the CDR data, and summing CDR amount attribute values for each set of CDR call entries having common values for the selected CDR call setup attributes. Each set of one or more CDR call entries having common values for the CDR call setup attributes are combined into a single refined CDR call entry having the common CDR call setup attribute values and the summed CDR amount attribute values. The summing process is repeated for each set of CDR data associated with each of a plurality of network elements. After summing the CDR attribute amount values for call entries having common CDR setup call attribute values for each switch, CDR attribute amount values associated with common CDR setup attribute values in call entries associated with all switches are summed to generate a final set of refined CDR data.