Trust the trend, not the point
When two devices disagree on a reading, the direction of the trend is what counts.
Two different devices report the same person differently, and one of them throws outliers that are simply wrong.
I built the Vault around trends and correlations. It discards outlier points, and it flags when the trends from two devices diverge.
The measured numbers disagree, but the trend lines usually move together. When one trends down while the other trends up over the same stretch, that is a real problem worth a look. The Vault tracks trends across devices.
One reading is noise. Two sources disagreeing in direction is signal.
Story details
| Type | Strong opinion |
|---|---|
| Year | 2026 |
| Firm telling | on the Common Ground wiki |