Have you ever implemented metrics to evaluate testing effectiveness?

Yes, I have implemented metrics to assess testing effectiveness. For example, I used the following indicators:

• Code Coverage — the percentage of code executed during tests.
• Number of defects found — how many bugs were identified over a certain period.
• Average time to fix a defect — helps evaluate the team's response speed.
• Percentage of automated tests — shows the level of automation.

These metrics allow for an objective assessment of testing quality and effectiveness, identify bottlenecks, and plan improvements.