Loyalty · The behaviour · Element
The repeat rate
How many customers come back, and how often.
The part
What it is
Measured over a period long enough to reflect the natural purchase cycle, which differs enormously between categories.
Cohort-based rather than aggregate, since an aggregate rate moves with acquisition volume rather than with loyalty.
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.