A detailed implementation plan coordinates migration and change-over to the new system. However, it is not actioned until Service Assurance can confirm that any outstanding risks to implementation have been mitigated. Audits are taken at intervals after implementation to establish the correctness of feasibility predictions and to ensure performance remains within agreed service levels. Application Performance Management may be harnessed to provide an accurate picture of the end-user experience of business processes as mapped to system architecture utilization.