The plan · The horizon · Element
The firm window
How far ahead the plan is committed.
The part
What it is
Set from the production lead time: firm has to be longer than the time a piece takes to make, or nothing can be produced to plan.
Usually four to six weeks for most formats, longer where approval is slow.
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.
The other elements in the horizon
The provisional
What is planned but changeable.
LearnThe themes
What is planned only as a subject area.
Learn