Final adjustments or the last-stage preparations to complete something; refers to final checks or tweaks to plans, schedules, or details (often used as 'to make final adjustments').
会議の前に資料の内容を最終調整して送付した。
I made final adjustments to the materials and sent them before the meeting.
プロジェクトは予算面の最終調整段階に入った。
The project has entered the stage of final budget adjustments.
スケジュールの最終調整をしてから出発日を決めましょう。
Let's decide the departure date after making the final schedule adjustments.