What is the primary purpose of deriving test cases in RSI Phase 5?

The primary purpose of deriving test cases in RSI Phase 5 is to ensure that all aspects of the requirements are covered. This phase is critical in the testing process because it focuses on developing test cases that align with the specific requirements set out earlier in the project. By deriving test cases based on these requirements, the testing team can verify that each requirement is being addressed appropriately, thus ensuring that the final product meets its intended functionality and user expectations.

Thorough coverage of requirements through test cases leads to increased confidence in the software's performance and reliability. It helps identify any gaps or misunderstandings in the requirements, which could lead to significant issues if not addressed before release. When each requirement is linked to a corresponding test case, it allows for more focused testing efforts, making sure that all necessary features and functions are evaluated.

While extensive documentation, improved software development lifecycle, and minimized testing time are also important aspects of the testing process, they serve more of a supportive role rather than the primary aim of deriving test cases. Ultimately, the focus should remain on ensuring that the product adheres closely to the established requirements.