Description: The Validation Process Model is a framework that defines the steps and activities involved in the validation process, especially in the context of software development practices such as Test-Driven Development (TDD). This model focuses on ensuring that the software meets the requirements and expectations of the client before final implementation. Validation involves verifying that the final product is the right one and that it has been built according to established specifications. In this sense, the model provides a clear structure that guides developers through the phases of planning, design, execution, and review of tests. Key features include identifying acceptance criteria, creating test cases, and documenting results. The relevance of this model lies in its ability to improve software quality, reduce errors, and facilitate communication between development teams and stakeholders. By following a well-defined validation process, organizations can ensure that the software not only functions correctly but also meets the needs of the end user, which is essential in a dynamic and agile development environment.