It can reduce the operations executed by the person on duty, inevitably depress mistakes happen and decrease the workload of the person on duty.

其目的是为了减少不必要的人为工作，降低可能的失误概率，避免意外情况下人身事故的发生。

Breakfast was fine with a cheery person on duty in the dining room .

早餐对于在餐厅值班的兴高采烈的员工来说似乎还行。