Channel selection · The experiment · Element
The learning
What each experiment showed, including the failures.
The part
What it is
Failures are the majority and are worth recording, or the same channel is retried every two years by someone new.
The record should say what was tried, at what spend, and what happened — three lines is enough.
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.