The fallback plan · The trigger · Element
The consequence
What happens when it fires.
The part
What it is
Either the fallback starts automatically or a named person has a short window to decide. Both work; ambiguity does not.
Where a decision is required, its own deadline should be shorter than the remaining lead time.
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.