The workshop can conclude that now is not the time.
If no section of the line carries the effort, or the plant is going through a change of another kind, that goes into the result. A workshop that can only lead to a project would be a sales event.
Target picture, in writing
One page: what should hold, who decides, how success would be recognized.
Use case
The named section of the line, with the reasoning for why it and not another.
Scope and edge sheet
What belongs, what does not, and which statement remains open at the end.
Roadmap
The order of steps with dependencies — without dates that have no basis yet.
Open assumptions
Anything we could not settle in two days is marked in the result as an assumption — not as a finding.