
Product Manager presents what she wants to get done and engages in a multi-day, sometimes multi-week, conversation with the Architect.
The conversation includes technical specs, desired cost, timeline for execution and lifecycle of the product.
Architect presents what is possible and when to meet all the requirements.

The Architect shares with the SA training SW the Questions & Answers that need to happen to extract all technical and non-technical specs and then instructs the SA to execute a process that uses those Answers to come up with his final product, a Block Diagram.
The Architect SA is autonomous and makes sure that all the Answers are available, or shares defaults with the Product Manager and then executes the process flow.

Architect's SA is able to establish the same dialog and is available 24x7 for interaction and background search of solutions.

Architect's SA is able to establish the same dialog, deliver the same product, and is available 24x7 for interaction and background search of solutions.
The Architect can go on vacation or even retire after training the Architect SA, it is up to him to update the SA as desired.