This TruthValue reflects the RDI (Remote Defect Indication) defect flag for this service, which is set when a remote MEP has signaled, via the RDI bit in its CCM, that it is itself detecting a defect on its side of the maintenance association. An admin treats a set RDI flag as a signal that the problem lies on the remote end (or in the path toward it) rather than locally, since RDI is specifically the far end telling this end 'I see a problem from where I sit'. For example, this service's RDI flag being set while the local MEP has no defects of its own would tell the admin to focus troubleshooting on the remote site or the path segment closest to it.