End-to-End Evaluation
End-to-End Evaluation is a testing and validation methodology that assesses the entire system or application from start to finish, simulating real-world user scenarios to ensure all components work together correctly. It focuses on verifying that the complete workflow, from input to output, meets functional and performance requirements, often involving integration of multiple subsystems. This approach is crucial for identifying issues that may not be apparent in isolated unit or integration tests.
Developers should use End-to-End Evaluation when building complex applications, such as web apps, mobile apps, or distributed systems, to ensure reliability and user satisfaction before deployment. It is particularly important in scenarios involving multiple technologies (e.g., frontend, backend, databases) or critical workflows like e-commerce transactions, where failures can have significant impacts. This methodology helps catch bugs early, reduce post-release issues, and validate that the system behaves as intended from a user's perspective.