Utilisation · The target set · Element
The headroom
The deliberate spare capacity, and what it is there to absorb.
The part
What it is
Headroom that has not been named is read as waste and removed during the next cost exercise, after which the queues appear and nobody connects the two.
Naming what it absorbs — demand variability, maintenance, peak periods — is what protects 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.
Demand variability
How much demand actually moves, which is what sizes the headroom.
Measure shared type