ases opened Interviewing key stakeholders In the post project assessment of a project to implement SIP trunks, important compo- nents to measure include the following: The speed of the implementation: How quickly was the implementation done? Was it completed on schedule? Were there any major delays? Hardware cost: Were these in line with expectations and budgets? Soft installation costs: Was the cost of new firewall code, updated WAN router software, and SO on as expected? New ongoing fixed costs: What new bandwidth was required to be purchased on an ongoing basis because of the adoption of SIP trunking? New ongoing variable costs: What is the cost per local minute, cost per trunk and cost for long distance of voice calls using the SIP trunk? Another important component of a post project assessment is interviews with the end users. In the interview of the end users, determine if the quality of the experience of the new solution with SIP trunks is as well accepted as the quality of their experience with TDM trunks. Note if an increase in the number of calls to the help center occurred or an increase in the number of cases have been opened with respect to call quality. Furthermore, during the interview process you need to determine if there are any issues or anomalies to areas that traditionally have few issues, such as the accuracy of call detail records, the display of an appropriate caller ID and caller name to the called party, and an accurate display of incoming caller ID or caller name. During the post project assessment, gather information about the settings and specifica- tions used. Successful configurations files of various items, such as WAN routers, securi- ty devices such as firewalls, and the Cisco Unified Border Elements (CUBE) used at the customer site should be recorded. The process undertaken for the porting of the DID numbers from their TDM trunks to SIP trunks should also be well documented as part of the post project assessment. The process might vary in each geographic location, but having the