management module. If on analysis, the network trouble module finds that the service problem will impact the customer, then a ticket needs to be raised by the network trouble management module to notify the customer and track the ticket to closure. Service/resource configuration: Fixing a network trouble might involve recon- figuring or altering current configuration of the elements in the network or it could also involve changing service configuration. To alter the resource or service configuration, an interaction is involved between the configuration module and trouble management module. The trouble management module issues the request to alter configuration to fix the trouble and the configura- tion module responds back on the status (success/failure) of the requested operation. Customer interface management: The customer interface management module can be a separate application, or performed as part of customer care/support processes. These modules directly interact with customers and translate customer requests and inquiries into manageable business events like creation of a work order, raising a trouble ticket, or generating an address change for sending bills. After raising a trouble ticket for a resource trouble, the issue needs to be communicated to the trouble management module. The trouble management module resolves the issue and provides information to a customer interface module for confirming the fix and clos- ing the ticket. NMS Functions 12.5 Resource Performance Management The performance management module works on data provided by the network data collection and distribution module. The performance data collected is used to create reports and is monitored to identify potential issues. If analysis of the performance records shows a violation of service agreement or degradation in quality due to network issues, then a notification is issued to the trouble manage- ment module. A performance management module needs to continuously moni- tor KPI (key performance indicators) and track a performance is