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Basé sur la classification professionnelle SOC
name quality-metrics description Measure quality effectively with actionable metrics. Use when establishing quality dashboards, defining KPIs, or evaluating test effectiveness. category testing-methodologies priority high tokenEstimate 900 agents ["qe-quality-analyzer","qe-test-executor","qe-coverage-analyzer","qe-production-intelligence","qe-quality-gate"] implementation_status optimized optimization_version 1 last_optimized 2025-12-02T00:00:00.000Z dependencies [] quick_reference_card true tags ["metrics","dora","quality-gates","dashboards","kpis","measurement"]
Quality Metrics
<default_to_action>
When measuring quality or building dashboards:
MEASURE outcomes (bug escape rate, MTTD) not activities (test count)
FOCUS on DORA metrics: Deployment frequency, Lead time, MTTD, MTTR, Change failure rate
AVOID vanity metrics: 100% coverage means nothing if tests don't catch bugs
SET thresholds that drive behavior (quality gates block bad code)
TREND over time: Direction matters more than absolute numbers
Quick Metric Selection:
Speed: Deployment frequency, lead time for changes
Stability: Change failure rate, MTTR
Quality: Bug escape rate, defect density, test effectiveness
Process: Code review time, flaky test rate
Critical Success Factors:
Metrics without action are theater
What you measure is what you optimize
Trends matter more than snapshots
</default_to_action>
Quick Reference Card
When to Use
Building quality dashboards
Defining quality gates
Evaluating testing effectiveness
Justifying quality investments
Meaningful vs Vanity Metrics
✅ Meaningful ❌ Vanity Bug escape rate Test case count MTTD (detection) Lines of test code MTTR (recovery) Test executions Change failure rate Coverage % (alone) Lead time for changes Requirements traced
DORA Metrics
Metric Elite High Medium Low Deploy Frequency On-demand Weekly Monthly Yearly Lead Time < 1 hour < 1 week < 1 month > 6 months Change Failure Rate < 5% < 15% < 30% > 45% MTTR < 1 hour < 1 day < 1 week > 1 month
Quality Gate Thresholds
Metric Blocking Threshold Warning Test pass rate 100% - Critical coverage > 80% > 70% Security critical 0 - Performance p95 < 200ms < 500ms Flaky tests < 2% < 5%
Core Metrics
Bug Escape Rate Bug Escape Rate = (Production Bugs / Total Bugs Found) × 100
Target: < 10% (90% caught before production)
Test Effectiveness Test Effectiveness = (Bugs Found by Tests / Total Bugs) × 100
Target: > 70%
Defect Density Defect Density = Defects / KLOC
Good: < 1 defect per KLOC
Mean Time to Detect (MTTD) MTTD = Time(Bug Reported) - Time(Bug Introduced)
Target: < 1 day for critical, < 1 week for others
Dashboard Design
await Task ("Generate Dashboard" , {
metrics : {
delivery : ['deployment-frequency' , 'lead-time' , 'change-failure-rate' ],
quality : ['bug-escape-rate' , 'test-effectiveness' , 'defect-density' ],
stability : ['mttd' , 'mttr' , 'availability' ],
process : ['code-review-time' , 'flaky-test-rate' , 'coverage-trend' ]
},
visualization : 'grafana' ,
alerts : {
critical : { bug_escape_rate : '>20%' , mttr : '>24h' },
warning : { coverage : '<70%' , flaky_rate : '>5%' }
}
}, "qe-quality-analyzer" );
Quality Gate Configuration {
"qualityGates" : {
"commit" : {
"coverage" : { "min" : 80 , "blocking" : true } ,
"lint" : { "errors" : 0 , "blocking" : true }
} ,
"pr" : {
"tests" : { "pass" : "100%" , "blocking" : true } ,
"security" : { "critical" : 0 , "blocking" : true } ,
"coverage_delta" : { "min" : 0 , "blocking" : false }
} ,
"release" : {
"e2e" : { "pass" : "100%" , "blocking" : true } ,
"performance_p95" : { "max_ms" : 200 , "blocking" : true } ,
"bug_escape_rate" : { "max" : "10%" , "blocking" : false }
}
}
}
Agent-Assisted Metrics
await Task ("Quality Trend Analysis" , {
timeframe : '90d' ,
metrics : ['bug-escape-rate' , 'mttd' , 'test-effectiveness' ],
compare : 'previous-90d' ,
predictNext : '30d'
}, "qe-quality-analyzer" );
await Task ("Quality Gate Evaluation" , {
buildId : 'build-123' ,
environment : 'staging' ,
metrics : currentMetrics,
policy : qualityPolicy
}, "qe-quality-gate" );
Agent Coordination Hints
Memory Namespace aqe/quality-metrics/
├── dashboards/* - Dashboard configurations
├── trends/* - Historical metric data
├── gates/* - Gate evaluation results
└── alerts/* - Triggered alerts
Fleet Coordination const metricsFleet = await FleetManager .coordinate ({
strategy : 'quality-metrics' ,
agents : [
'qe-quality-analyzer' ,
'qe-test-executor' ,
'qe-coverage-analyzer' ,
'qe-production-intelligence' ,
'qe-quality-gate'
],
topology : 'mesh'
});
Common Traps Trap Problem Solution Coverage worship 100% coverage, bugs still escape Measure bug escape rate instead Test count focus Many tests, slow feedback Measure execution time Activity metrics Busy work, no outcomes Measure outcomes (MTTD, MTTR) Point-in-time Snapshot without context Track trends over time
Related Skills
Remember Measure outcomes, not activities. Bug escape rate > test count. MTTD/MTTR > coverage %. Trends > snapshots. Set gates that block bad code. What you measure is what you optimize.
With Agents: Agents track metrics automatically, analyze trends, trigger alerts, and make gate decisions. Use agents to maintain continuous quality visibility.
