What is the main purpose of test case design techniques?

The main purpose of test case design techniques is to ensure good test coverage and efficiency. These techniques provide structured approaches for creating test cases that thoroughly validate the functionality of the software being tested. By utilizing specific design techniques, testers can systematically derive test cases that cover various functional and non-functional aspects of the application, ensuring that different input scenarios, edge cases, and expected outcomes are taken into consideration.

This systematic approach helps to reduce redundancy and optimize testing efforts, leading to more effective use of resources and time while identifying the most critical functionalities that need to be tested. Good test coverage combined with efficiency not only helps in uncovering defects but also in providing confidence in the quality of the software product before it is released.