This is the 9511th most frequent Japanese word.
素案
A draft plan or proposal.
Here, '素案' is used to indicate an initial version of a document or plan that needs modifications.
その素案にはいくつかの修正が必要です。
The draft requires several revisions.
In this sentence, '素案' reflects the early-stage draft or concept phase in the development process.
素案段階でも問題点が明らかになりました。
Problems became clear even at the draft stage.
In this sentence, '素案' is used to refer to a preliminary draft or plan prepared for the new project.