Test Case Development is the process of creating a set of conditions or variables to determine if a software application behaves as expected. Each test case outlines specific inputs, execution steps, and the expected outcomes, ensuring that all functionalities are thoroughly evaluated. This helps identify any defects or issues before the software is released. Effective test case development involves understanding the requirements of the software and designing tests that cover various scenarios, including edge cases. By systematically documenting these test cases, teams can ensure comprehensive testing, improve software quality, and facilitate easier maintenance and updates in the future.