Quantifying measurement confidence across analytics platforms — where data disagrees, coverage gaps exist, and how much to trust your numbers
Composite measure of data accuracy, coverage, and freshness
| Issue Type | Platform | Events Affected | Impact | Status | Priority |
|---|---|---|---|---|---|
| Session timeout mismatch | GA4 vs Amplitude | 142,380 | High | In Progress | P0 |
| Ad blocker impact | Client-side tracking | 89,120 | Medium | Monitoring | P1 |
| Missing UTM parameters | All platforms | 67,450 | Medium | In Progress | P1 |
| Consent rejection rate | EU traffic | 54,200 | High | Monitoring | P0 |
| Cross-domain tracking gaps | GA4 | 38,900 | Medium | Planned | P2 |
| Server timestamp drift | Server-side events | 29,340 | Low | Resolved | P2 |
| iOS ATT opt-out | Mobile apps | 21,780 | Medium | Monitoring | P1 |
| Sampling threshold exceeded | Google Analytics | 18,920 | Low | Planned | P2 |
| Platform | Sessions | vs Source of Truth | Confidence |
|---|---|---|---|
| Server-Side (Truth) | 487,234 | — | 100% |
| Google Analytics 4 | 431,890 | -11.4% | 82% |
| Amplitude | 468,120 | -3.9% | 91% |
| Mixpanel | 452,340 | -7.2% | 86% |
| Adobe Analytics | 478,900 | -1.7% | 94% |