Keeping it · The failure record · Element
The rate
How often the promise fails, per period.
The part
What it is
Reported as a rate against opportunities rather than as a count, so that growth does not read as deterioration.
Against the expected failure rate implied by the margin, which is what shows whether the promise is set correctly.
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.