Learned playbook
Customer LTV review — 5 rules
Segment by acquisition channel before calculating anything
Split customers by how they were acquired before computing any LTV number.
Flag "at-risk" against the customer's own cadence, not a fixed calendar window
Compare each customer's current order frequency to their own historical pattern, not a single company-wide rule.
Calculate LTV:CAC per cohort, not company-wide
Run the ratio separately for each acquisition channel and flag any cohort below 3×.
Measure retention on a rolling 90-day window, segmented by first purchase category
Track retention by what someone bought first, not just by signup date.
Only surface signals that changed since the last review
Show what's new, not the full dataset every time.