draft plan; rough plan; preliminary proposal
Refers to an initial, unpolished version of a plan or proposal, often used in business, government, or organizational settings before formal approval.
The committee put together a draft of the new regulations.
Let's first create a rough plan and then work out the details.
We drew up a draft plan for next year's budget.
Please put together a draft plan before the meeting.
The person in charge submitted a draft plan for the new system.
The committee decided to review the draft plan.
試案 stresses a tentative, trial idea meant to be tested, while 素案 is simply the first rough draft of a plan.
たたき台 is a casual term for a base draft meant to be picked apart and revised, while 素案 is the more neutral, business-like word for a rough plan.
素案 is a bare-bones initial idea or plan, often more abstract, while 下書き is a written or drawn rough version already put on paper.
Compound of 素 (そ, 'bare, unadorned') and 案 (あん, 'plan, proposal'), literally meaning 'bare plan'.