What is the purpose of applying test design methods in software development?

Test design methods are used for the systematic and efficient creation of test cases to improve software quality and reduce the number of defects.

Main objectives:

• Ensure comprehensive testing — cover all important scenarios and use cases.
• Optimize the number of tests — avoid redundant and repetitive checks.
• Increase testing efficiency — identify errors early.
• Standardize the test creation process — facilitate understanding and maintenance of test documentation.

Example: when testing a form with an "age" field, boundary analysis can be applied to check values at the limits of the acceptable range (e.g., 0, 1, 100, 101), which helps identify boundary case errors.