SKA precursor facilities are those telescopes on one of the two SKA candidate sites, carrying out SKA-related activities, and with a mechanism in place for communicating results to the international SKA project.
SKA pathfinder facilities are those testing one or more SKA-related technologies, with a mechanism in place for communicating results to the international SKA project.
Design studies are projects studying one or more major SKA sub-systems, including prototype construction, with the aim of communicating results back to the international SKA project.