Fixed points · The freeze periods · Element
The windows
When the freeze applies.
The part
What it is
Around demand peaks and critical fixed dates, with a margin on either side rather than exactly the peak.
Published at the start of the year so the plan can be built around them.
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.