Resilience · The dependency map · Element
The tiers
What sits behind each direct supplier.
The part
What it is
Second tier is usually obtainable by asking; third tier rarely is, and the honest map records where knowledge stops.
The question worth asking each supplier is what single input they could not replace, which gets to the point faster than a full mapping exercise.
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.