Abstract: A layered architecture for a network information management system integrates data about the network supplied by disparate sources, each specific to network equipment from a particular vendor, by mapping the data into a common data model that represents a unified view of the network. The data is stored into a storage structure based on characteristics of the data and the data in the storage structure is subsequently correlated into information pertaining to the unified view of network. The information is presented to a user in various formats. The network information management system can further perform a knowledge analysis on the information to evaluate the network, detect problems in the network, and to suggest solutions to any problems detected. The knowledge analysis is based on a knowledge scenario that relates the information with an analysis process that performs the analysis.