The decision

Whether to change the scope or exit the work.

The part

What it is

Both are legitimate. Leaving the discrepancy unresolved is the third option and the one usually taken.

Widening the scope to accommodate whatever the organisation has drifted into is a real decision and should be made as one rather than by rewriting a sentence.

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.

Decision
Widen the scope, exit the work, or accept the discrepancy.
Choice shared type
Decided by
Who took it, since it is a strategy decision.
Person shared type
Reason
The reasoning, which will be asked for later.
Reason shared type