Sequencing and optimal scheduling method was developed for approach control of air traffic to handle increasing traffic volumes.

针对空中交通进近管制地区日益繁忙的交通流量，设计了一种进近排序及优化调度方案。

youdao

In 2007, the NTSB, citing a series of fatigue-related air traffic control incidents, implored the FAA to reform its scheduling practices and implement a fatigue-management program, but the FAA took no action.

CNN: FAA knew controllers nap, ignored fatigue issue