To measure software testing effectiveness, monitor test coverage, defect density, and defect detection rate for comprehensive code scrutiny. Assess mean time to detect and resolve defects, ensuring timely issue identification and resolution. Optimize test execution time for efficiency. Evaluate test case effectiveness and regression test coverage to gauge their impact. Solicit customer feedback to gauge satisfaction. Finally, ensure adherence to the test plan to maintain alignment with testing objectives. These metrics collectively provide a holistic view of the testing process, guiding improvements for higher-quality software delivery.