"What process adaptations are required if the prototype will evolve into a deliverable system or product?"

From Wikipedia: "In Project Management terms, a deliverable is a tangible or intangible object produced as a result of project execution. A deliverable can be created from multiple smaller deliverables."

NOTHING...

Milestone - A significant point (or event) in the life of a project.

Deliverable - Any item that is passed on to the End-user or customer as part of the project.

Difference: Acquiring the team to do the project is a milestone but the work done by that team will be a deliverable

The US program began in 1950 and tested its first device in 1952 and tested a deliverable bomb in 1954.

The USSR program began in 1950 and tested a deliverable but limited bomb in 1953 and tested a full scale deliverable bomb in 1955.