The cadence

How often the instrument is run.

The part

What it is

Annual is adequate for most brands; more frequent measurement produces noise rather than information because perception does not move that fast.

Timing should be held constant too, since seasonal effects are real and are otherwise read as change.

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.

Frequency
How often it is run.
Period shared type
Run at
The point in the year, held constant to avoid seasonal artefacts.
Date shared type
Last run
When the most recent wave was.
Date shared type