Example methods disclosed herein to manage and process data associated with network usage include creating first links to represent relationships between event data items and rated data items, and creating second links to represent relationships between the rated data items and billed data items. Such example methods also include, in response to a request for network usage information associated with a first billed data item received after the first billed data item has been generated, processing a first one of the second links to identify a first rated data item associated with the first billed data item, processing a first one of the first links to identify a first event data item associated with the first rated data item, and returning the first event data item in response to the request.