Most teams I talk to don't find out a number broke from a dashboard. They find out from a customer complaint, a bad month, or someone finally opening a spreadsheet they'd been ignoring.
I'm curious how the makers here handle this. Say a conversion rate quietly drops 15%, or churn ticks up, or a location's sales dip. What actually alerts you? A tool, a weekly review, gut feel, or you just find out late like the rest of us?