Pricing · The price list · Element
The tiers
How price changes with volume, commitment or package level.
The part
What it is
Tier boundaries are behavioural instruments. Customers cluster just below them, which is either the intent or an accident worth noticing.
The number of tiers is itself a decision: too few and segments are badly served, too many and the choice becomes work for the buyer.
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.