expression, godan verb (-ku)
take shape; be mostly complete; the main parts are done
Idiomatic expression meaning that the outline or essential parts of a plan, project, or work have been settled, so the rest can proceed smoothly. Literally 'the nose and eyes are attached', implying a face has taken form.
企画の目鼻が付いたら、すぐに実行に移しましょう。
Once the plan takes shape, let's move on to execution right away.
引っ越しの準備はまだ目鼻が付いていない。
The preparations for moving haven't taken shape yet.