noun, noun which may take the genitive case particle 'no'
tentative plan; draft proposal
A preliminary or trial plan, often used in business, policy, or committee contexts. Implies it is subject to revision.
The committee announced a tentative plan for the new system.
At the draft proposal stage, there is still a possibility of changes.
The committee drew up a tentative plan for the new system.
He submitted a draft proposal to his boss.
This plan was presented as a tentative proposal.
It was decided that the tentative plan would be examined at the meeting.
素案 is a rough sketch of an idea before it's formalized, while 試案 is a more developed tentative plan ready for review.
試案 is typically counted with 件 as in 一件の試案, treating each tentative plan as a matter or item under discussion.
Compound of 試 (trial, test) and 案 (plan, proposal).