Test management for an upgrade and migration of a telephony system

PTA develops the test strategy for the customer's test activities and documents it in a test concept. Detailed acceptance tests are carried out by the users on a test system to check the functional scope, the migrated data, and the functional integration with third-party systems on the updated telephony system. On go-live day, a subset of the acceptance tests are performed by the users on the productive telephony system in a business acceptance test to confirm the functionality on the productive telephony system. The PTA accompanies and supports the customer during the test case creation and test execution and takes over the operative test management within the scope of the customer's test activities. This also includes monitoring and controlling the test activities as well as error management and the associated communication with the service provider.