Which is not a major task of test implementation and execution?

The correct choice is based on the responsibilities typically associated with test implementation and execution. This phase involves the actual preparation for testing, which includes defining the tests that will be executed, setting up the environment, and carrying out the tests.

In context, logging the outcome of test execution and recording software identities is crucial as it provides a record of what was tested and the results, which informs further testing and helps in identifying issues. Verifying that the test environment has been set up correctly is also a primary task, ensuring that the tests run in the right conditions and contexts. These tasks are directly related to implementing the tests and executing them effectively.

On the other hand, checking test logs against exit criteria specified in test planning typically occurs after the execution phase. It is part of the assessment of test results rather than the direct implementation or execution of tests, thus making it less aligned with the core activities of test implementation and execution.