The calendar · The cadence · Element
The adherence
Published against planned.
The part
What it is
The one content measure almost nobody keeps, and it explains most of the others. A cadence that is missed a third of the time is not the cadence.
What was missed matters as much as how much. Repeatedly dropping the same format is a decision that has never been taken.
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.