Communication · The margin · Element
The trade
The decision about how much margin to leave, and why.
The part
What it is
A wide margin makes the promise less compelling and almost never broken. A narrow one is more attractive and fails regularly.
Recording the decision prevents the margin being narrowed incrementally by whoever is under pressure to make the offer stronger.
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.
Expected failure rate
How often the promise is expected to break at this margin.
Percentage shared type