A preliminary investigation or survey carried out before the main investigation, work, or procedures to check conditions and identify issues.
新しい工事の前に、土地の予備調査を行った。
We conducted a preliminary survey of the land before the new construction.
裁判に備えて弁護士が証拠の予備調査を進めている。
The lawyer is carrying out a preliminary investigation of evidence in preparation for the trial.
調査チームが現地で予備調査を実施した結果、追加の検査が必要になった。
As a result of the team's preliminary on-site investigation, additional inspections became necessary.