Slippage · The usual suspects · Element
The sources
Where the delay comes from.
The part
What it is
Identified from the record rather than from opinion, since opinion locates delay in other people’s departments.
Three or four sources usually account for most of it.
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.