Slippage · The ratio · Element
The figure
The overall ratio.
The part
What it is
Actual divided by planned, across the record. Most organisations land between 1.3 and 2.0 and expect to be told 1.1.
Recalculated periodically, since it moves slowly and does move.
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.