Σ ABS(drift) per BusinessDay end, one line per account_role. Healthy days sit on the zero baseline; spikes mark when the feed or the parent-roll-up diverged. Use this to spot recurring violations vs one-off events — a role that spikes every Monday is a different problem than a role that spiked once after a deploy. KPIs surface the largest single-day magnitude in the past 7 days.
Max Σ ABS(drift) on any single BusinessDay across leaf accounts in the visible date range. Healthy = $0.
Max Σ ABS(drift) on any single BusinessDay across parent accounts in the visible date range. Healthy = $0.
Σ ABS(drift) per BusinessDay end for leaf accounts, one line per role. A role hugging zero is healthy; persistent non-zero ⇒ ongoing feed divergence; one-off spike ⇒ isolated event worth drilling into.
Σ ABS(drift) per BusinessDay end for parent accounts, one line per role. Non-zero ⇒ child postings didn't roll up correctly that day.