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ISTQB Certified Tester Foundation Level (CTFL) v4.0 · ISTQB
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The triggers for maintenance and maintenance testing can be classified as follows: • Modifications, such as planned enhancements (i.e., release-based), corrective changes or hot fixes. • Upgrades or migrations of the operational environment, such as from one platform to another, which can require tests associated with the new environment as well as of the changed software, or tests of data conversion when data from another application is migrated into the system being maintained. • Retirement, such as when an application reaches the end of its life. When a system is retired, this can require testing of data archiving if long data retention periods are required. Testing of restore and retrieval procedures after archiving may also be needed in the event that certain data is required during the archiving period.