Drop-off · The reasons · Element
The pattern
What recurs across departures at this stage.
The part
What it is
A stage where most departures share a reason has one fixable problem. A stage where reasons are scattered has a design problem.
The recurring reason is frequently a question nobody answered rather than a deficiency in the offer.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.