1. A method for analyzing a stream of usage detail records (UDRs), the method comprising: receiving the stream of UDRs from an observation point within a network; computing an amount of bandwidth utilized by each UDR as each UDR is received from the observation point; generating a statistical distribution of the UDRs based on the amount of bandwidth utilized by each UDR; and analyzing the statistical distribution to detect a congested location associated with the observation point.