兩件事嘅調查都發現 長時間嘅輪班工作 、 警覺性降低 同疲倦過度 導致員工出現判斷錯誤 亦係呢次災難嘅一大原因
Investigations into both cases found that long shifts, decreased alertness, and excessive tiredness led to errors in judgment or a major cause of the disaster