Essential Software Testing Metrics: How to Measure Quality and Progress
This guide presents a comprehensive set of software testing metrics—including workload deviation, execution and pass rates, coverage, defect detection and lifecycle—to help teams quantitatively assess development progress, test effectiveness, and overall product quality.
Workload Deviation : ((Actual workload - Planned workload) / Planned workload) * 100% — measures progress.
Test Execution Rate : (Executed test cases / Total test cases) * 100% — measures test progress.
Test Pass Rate : (Passed test cases / Total test cases) * 100% — reflects development quality.
Requirement (Test Case) Coverage : (Number of requirements with designed test cases / Total requirements) * 100% — evaluates test design quality.
Requirement Pass Rate : (Requirements passed testing / Total requirements) * 100% — indicates progress.
Test Case Hit Rate : (Total defects / Number of test cases) * 100% — assesses test case quality.
Reopen Defect Rate : (Reopened defects / Total defects) * 100% — gauges development quality.
NG Rate : (Verification‑failed defects / Total defects) * 100% — gauges development quality.
Defect Effectiveness Rate : (Effective defects / Total defects) * 100% — measures testing effectiveness.
Defect Fix Rate : (Resolved defects / Total defects) * 100% — measures development efficiency.
Defect Lifecycle : Average time from defect submission to closure — applies to development and testing.
Average Defect Fix Duration : Average time from defect submission to fix — applies to development.
Average Defect Close Duration : Average time from defect fix to closure — applies to testing.
Defect Detection Rate : (Defects found by testers / (Defects found by testers + Defects found by customers)) * 100% — measures test quality.
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