The cycle · The demand cycle · Element
The stability
How reliable the pattern is.
The part
What it is
A shape that holds across several years can be planned against. One that moves cannot, and planning against it produces false precision.
Worth stating explicitly, since a plotted line looks equally authoritative either way.
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.