In which phase do you create "an ordered list of everything that is known to...

In the SAP Activate methodology, "an ordered list of everything that is known to be needed in the product" is typically created in the:

D. Explore phase: During this phase, the project team works to define the detailed scope of the project, including creating comprehensive lists of requirements that capture all that is needed in the product. This includes both functional and non-functional requirements which are documented and agreed upon to guide subsequent project activities.

Options A (Prepare), B (Discover), and C (Realize) involve other types of planning and implementation activities, but the detailed scope definition and requirement listing are central to the Explore phase.References:

SAP Activate project phases description

Explore phase activities in SAP projects

Workstreams Overview