ecords need to be maintained for performance analysis, it is common to have a dedicated repository for archival of performance records. The network performance monitoring application will access the repository for storage and analysis of data. 47. Network planning: These applications deal with all types of planning associ- ated with different technology layers in the network. Engineering works and meeting unpredicted demands cannot be performed without proper plan- ning. There would be considerable network rearrangement and relocation of network capability that needs to be planned to meet operational scenarios. Use of network planning applications brings in considerable cost benefit to the telecom company. Management Applications Network planning is required in fulfillment and assurance functions. As part of fulfillment, network planning ensures that sufficient resources are available to meet the capacity requirements for individual services. Network planning applications support assurance process by doing fault planning for network repairs. It also does performance planning for traffic engineering. 48. Network problem management: These applications has the capability to record problems and provide necessary escalation of the problem based on predefined criteria. Problem management systems are able to associate the effects of problems to root causes based on root cause analysis systems or human deduction. The trouble ticket application records a trouble condition. If the trouble condition relates to a network level problem, then the ticket details are send to the network problem management module. The service or customer level description of the problem is mapped to network specific events and con- ditions at the network problem manager. The network problem manager internally tracks the problem resolution at network level between various departments and notifies the service problem management module on the problem status. 49. Network provisioning and configuration: Order fulfillment involves service provisioning/