Deliverability · The cost to keep · Element
The standing cost
What is held in reserve so the promise can be kept.
The part
What it is
Spare capacity, stock, staffing above the average requirement, and the systems that make the promise possible. This is paid whether or not anyone invokes it.
It is also the first thing cut in a cost exercise, because it looks like slack rather than like the promise.
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.