Revenue quality · The concentration measure · Element
The customer concentration
What share of revenue the largest customers represent.
The part
What it is
The usual reporting thresholds — largest customer, top five, top ten — are conventional and adequate.
The number that matters is what happens to the organisation if the largest leaves, which is a different question from what share they hold.
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.