Test Execution 8 Test Coverage Pass Rate Fail Rate Test Case Effectiveness Test Execution Productivity Test Design Productivity Test Cycle Time Requirements Coverage
Defect Metrics 9 Defect Density Defect Removal Efficiency Defect Leakage Defect Rejection Ratio Reopen Rate Defect Age Defect Severity Index Cost Per Defect Defect Containment Efficiency
Reliability & Availability 7 MTBF MTTF MTTR MTTD Availability Failure Rate Reliability Over Time
Code Coverage 6 Statement Coverage Branch Coverage Function Coverage Condition Coverage Path Coverage MC/DC Coverage
Code Quality 7 Cyclomatic Complexity Halstead Volume Halstead Difficulty Halstead Effort Maintainability Index Technical Debt Ratio Code Churn
Performance & Load 5 Throughput Response Time Percentile Apdex Score Error Rate Concurrency Capacity
Automation Economics 5 Automation Coverage Automation ROI Automation Break-Even Point Flakiness Rate Automation Maintenance Overhead
Risk & Cost 4 Cost of Quality Risk Exposure Test Effort Estimation Return on Test Investment
Security Testing 4 CVSS Base Score Vulnerability Density Mean Time to Remediate Patch Latency
Usability 4 Task Completion Rate SUS Score Error Rate Per Task Average Time on Task
Statistical & Sampling 2 Sample Size Wilson Confidence Interval
