Sizing · The sanity check · Element
The sensitivity
Which assumption the answer actually depends on.
The part
What it is
Usually one input dominates. Identifying it directs the research budget at the thing that would change the conclusion.
An assumption that could halve the answer and rests on nothing is the finding, not the total.
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.