How do you evaluate the effectiveness of automated tests?

I evaluate the effectiveness of automated tests based on several key metrics:

• Code and functionality coverage: how well the tests cover critical paths and business logic.
• Reliability: tests should be stable, without false positives.
• Execution time: optimal runtime to avoid slowing down the CI/CD process.
• Maintainability: how easy it is to update and extend tests when the product changes.
• Defect detection: how well tests help identify real bugs.

To assess, tools for code coverage, test report analysis, and metrics on time and failure frequency can be used. It is important to balance testing depth with the costs of maintaining automated tests.