What does TDD stand for in software development?

TDD stands for Test-Driven Development, which is a software development approach that emphasizes writing tests before writing the actual code. This methodology is built on the principle that tests guide the development process by defining the expected behavior of the software.

In TDD, developers first write a test for a small piece of functionality that they plan to implement. When the test is created, it initially fails because the functionality has not been developed yet. The developer then writes the code necessary to make this test pass. Once the code is written, the developer runs the test again, and if it passes, they can refactor the code while keeping the functionality intact. This cycle of writing a test, making it pass, and then refactoring promotes better code quality, helps identify issues early, and fosters a more structured approach to software development.

The other options represent different concepts that do not align with the practice of TDD. For example, Targeted Design Development, Technology Driven Design, and Team Development Dynamics do not encapsulate the testing-first philosophy that is central to Test-Driven Development.