This is an important output of the preliminary phase.
Everything starts here. The request for architecture work is sent from the sponsoring organization to the architecture organization to trigger the start of an architecture development cycle. This is formally produced with the assistance of the architecture organization as an output of the preliminary phase.
The request for architecture work is created for triggering a new ADM cycle. That is:
This document should have only high level information. TOGAF suggested the following contents of this document (in respect to the architecture work)
Essentially, the intention of the sponsoring organization is formally translated into a request for architecture work - in the preliminary phase.