Field notes
Field notes
Practical writing on subscription lifecycle measurement, churn signals, and renewal cohorts — rooted in programme work, not generic productivity advice.
12 Jun 2026
Why grace periods distort churn headlines
When failed payments sit inside a grace window, headline churn can spike without a matching rise in voluntary exits.
28 Apr 2026
Building renewal cohorts from first payment, not invoice month
Invoice-month cohorts flatten annual renewals into artificial monthly noise. First-payment cohorts keep peers together.
18 Feb 2026
Three churn signals that rarely survive a desk check
Login freefall, NPS dips, and open-rate slides often fail as early warnings once you align them to real renewal windows.