Reviewing the test basis is a part of which phase?

Reviewing the test basis is an essential activity during the Test Analysis and Design phase. This phase involves examining the documents and information that serve as the foundation for test development, such as requirements specifications, design documents, and any relevant information related to the system under test. By reviewing the test basis, testers can ensure that they have a clear understanding of the criteria against which the system will be tested, allowing for the design of effective test cases and scenarios.

This activity is crucial as it directly influences the quality and relevance of the testing process. It helps in identifying any gaps in the requirements or inconsistencies in the documentation, which can be addressed before moving on to the implementation and execution of tests. Therefore, the rationale for the option being correct is tied to its role in laying the groundwork for systematic analysis and accurate design of tests based on reliable information.