Solution Architecture Review Document

Note: Project description comes from PO and PM or Scrum Master which is coming back from business people to them and they will document them.

PO or PM makes the decision on in-scope and out-of-scope and PM makes the document on this 

Same is Vision document

Refer the application roadmap(last column) and understand how it will impact the systems. Don't list the application which will not be impacted(blue in the above diagram).

C4 diagram

The NFR should be more detailed level compared to the IT Architecture vision document.