The volume

How many give up.

The part

What it is

Compared with completed contacts, since a support function handling a thousand contacts while two hundred people gave up is not performing as its statistics suggest.

The ratio is a better measure of accessibility than any response time.

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.