Resolution · The repeat rate · Element
The rate
How often people come back.
The part
What it is
Same customer, same issue, within a window appropriate to the product. Seven days is typical for transactional issues.
The window matters: too short and it misses returns; too long and it counts unrelated contacts.
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.