Behaviour change · The control · Element
The group
Who is in the control.
The part
What it is
Eligible customers not enrolled, matched on prior behaviour, or a region or period without the programme.
Random assignment is best and rarely available; matched comparison is the practical alternative.
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.