This is the Relative Name (RN) of a threshold policy object: the single naming component that, combined with its parent's DN, distinguishes this threshold policy from any sibling instances under the same parent. Admins rarely read the RN by itself, but UCS Manager and management tools use it to build and parse the full DN path so each instance of the overall threshold policy container an admin attaches to hardware or a service profile, which in turn holds many individual threshold definitions can be addressed uniquely. For instance, when a hardware/service profile has several threshold policies attached, the RN is the piece that differs between their otherwise-identical parent DNs, letting a script enumerate all of them.