Slippage · The ratio · Element
The application
How it is used in planning.
The part
What it is
Applied to new estimates as a matter of course rather than argued about each time.
The argument that this time will be different is made every time and is right roughly as often as chance would suggest.
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.