The schedule was pushed back compared to the previous times, but we focused on our training and managed to complete it within a short period of time.
ご質問ありがとうございます。
"The schedule was pushed back"=「スケジュールは遅らせることなった」
"compared to the previous times"=「従来よりも」
"but we focused on our training"=「でも研修に集中した」
"and managed to complete it within a short period of time."=「そして短期間で完了することを無事できた。」
ご参考に!