Artifact: Activation Metric Definition — Kestrel

A precise activation-event definition for Kestrel -- exercises co-20. Kestrel is a fictional product; every quoted number, question, or finding here is an illustrative, constructed example, not real data or a real transcript.

Activation event: a new team's manager publishes their first complete weekly schedule -- every open shift for the coming week assigned to a specific staff member -- within 3 days of signing up.

Why this and not "created an account" or "added one employee": creating an account or adding a single employee record costs the manager almost nothing and delivers no value on its own -- neither event corresponds to Kestrel actually replacing the manager's prior paper-and-texts process for even a single week.

Measurement: the signup timestamp and the first-schedule-published timestamp for every team, published to the analytics pipeline as days_to_first_publish; a team "activates" if that value is ≤ 3 days.