Decision points · The decision · Element
The deferral
What deferring costs.
The part
What it is
Each deferral consumes margin and then lead time. After enough of them the fallback has quietly expired.
Recorded with its cost, which usually ends the practice.
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.