The depth record

How many people hold each capability, and at what level.

The part

What it is

Depth is the difference between having a capability and being able to rely on it. One person at expert level and nobody else is a capability with a resignation attached.

Recording level as well as count prevents the arithmetic error of counting three people as cover when two of them are still learning.

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.

Headcount
The raw count is what makes single-point dependencies visible without any further analysis.
Number shared type
Level
Three people at novice level are not cover for one expert; the level is what stops that mistake.
Choice shared type
Holder
Naming holders is what turns the map from an abstraction into something that can be acted on.
Person shared type