先来先服务
　 第一个进入输入井的作业先执行，那么该作业就有一个执行结束的时间，那么在该作业运行时间内，满足时间条件的作业进入输入井，然后根据前一个作业的运行结束的时间推算和下一个作业要进入输入井的时间推算下一个作业时间开始运行的时间：
Time = max（curendtime，nextstarttime）;这样后作业运行的开始时间就计算出来了，
那么加上一个运行长度就是该作业的结束时间，周转时间即为结束时间减去进入输入井的时间(first come first served

The first operation into the input shaft of the first execution, then the operation will have an executive at the end of time, then the running time of the operation, to meet the conditions of time homework enter wells, then according to the operation before the end of a run time calculation and the next job to enter the input shaft of the estimated time of operation the next time a running time:

Time = max (curendtime, nextstarttime); then the start time of the post operation is calculated,

Then, a running length is the end time of the job, and the turnaround time is the end time minus the time to enter the input well)