Subjects Under Management (SUM)
The population the Directorate actively steers. The number it most wants to see rise.
Formula
Thresholds & Bands
| Band | Range | State |
|---|---|---|
| Growing | ≥ 48000 | ok |
| Flat | 40000-48000 | warn |
| Shrinking | < 40000 | crit |
Why This Metric Matters
Subjects Under Management is the Directorate's primary growth indicator, representing the total population under continuous VITALNET observation and therapeutic management. Every Directorate capability -- from behavioral modeling to dose delivery to narrative calibration -- scales in effectiveness with the size of the managed cohort. A shrinking SUM signals either enrollment failure, subject attrition, or coverage-gap expansion, each of which undermines the Directorate's mandate of total population stewardship. This metric is the single figure most frequently cited in Directorate performance reviews and Board-level briefings.
Threshold Justification
The 48,000-subject growing-band floor was set based on PANACEA population-modeling projections that identified this threshold as the minimum cohort size at which behavioral-prediction models retain statistically significant accuracy across all demographic segments. The 40,000 critical floor represents the point below which VITALNET sensor density per capita drops below the level required for reliable continuous coverage, as established during the Phase-2 coverage validation exercise.
Historical Context
At program launch, SUM stood at approximately 12,000 subjects concentrated in the initial pilot zones. Aggressive enrollment campaigns and the introduction of the Halo implant incentive program drove SUM past 30,000 by Q2 2025 and past the 48,000 target by Q4 2025. Growth has since moderated to 2-3% per quarter as the remaining unenrolled population consists increasingly of hard-to-reach or non-compliant segments requiring targeted outreach strategies.
Collection Method
SUM is derived from the VITALNET subject registry, which maintains a real-time count of all individuals with active sensor coverage -- whether via Halo implant, wearable device, or environmental biometric tracking. The Synaptic Data Fabric reconciles the registry against implant heartbeat signals and wearable check-ins on a continuous basis, automatically decrementing subjects whose telemetry has been absent for more than 72 hours. The reported figure is a point-in-time snapshot refreshed every 60 seconds on the PANOPTICON dashboard.
Known Failure Modes
The most common inflation error occurs when subjects with multiple tracking modalities (e.g., both an implant and a wearable) are counted as separate entries due to identity-resolution failures in the registry deduplication layer. Conversely, SUM can undercount during VITALNET mesh outages when large numbers of subjects simultaneously lose telemetry and are decremented by the 72-hour absence rule, only to reappear when connectivity is restored. Deceased or permanently relocated subjects may persist in the active count if their disposition is not formally logged by field operations, inflating the figure without corresponding operational coverage.