The collectability

Whether it can be measured reliably.

The part

What it is

A measure requiring manual collection will be collected inconsistently and then abandoned, which is worse than not choosing it.

Cost of collection belongs here, since a measure costing more to gather than the decision is worth should not be chosen.

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.

Collection method
Automatic, semi-automatic or manual.
Choice shared type
Effort per period
What collecting it costs.
Duration shared type
Reliability
How consistently it could actually be gathered.
Confidence shared type