Abstract: An apparatus, computer-implemented method and computer program are disclosed for organization and analysis of high-scale low-signal (HSLS) data. The method may comprise providing one or more raw datasets representing CDRs and processing the raw datasets to generate an object-relational model comprising a plurality of objects, each object having an object type and properties of the respective object type. The method may also comprise receiving at least a first query comprising, for at least one object type of the object-relational model, at least a first property relating to a first investigation and applying the at least first query to the stored object-relational model to generate a first subset of the CDRs. Responsive to selection of an analysis command, the method may comprise performing a predetermined type of analysis associated with the analysis command on the first subset of CDRs to produce a resultant subset of the CDRs.