The destination

Who the owner escalates to.

The part

What it is

A named person rather than a committee. Committees meet on a schedule, and a blockage does not.

Where the blockage sits outside the reporting line, the escalation destination is often someone the owner does not work for, which needs to be agreed in advance.

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.