(1).　　每个进程有一个进程控制块（PCB）表示。进程控制块包含如下信息：进程名、优先级、到达时间、需要运行时间、已用CPU时间、进程状态等等。

(2).　　进程的优先级及需要的运行时间可以事先人为地指定，进程的运行时间以时间片为单位进行计算。

(3).　　每个进程的状态可以是就绪 r（ready）、运行R（Running）、或完成F（Finished）三种状态之一。

(4).　　就绪进程获得 CPU后都只能运行一个时间片。用已占用CPU时间加1来表示。-(1) Each process has a process control block (PCB) said. Process control block contains the following information: process name, priority, arrival time, you need to run time, CPU time, process status. (2) the priority of the process and the running time required can be artificially in advance specified, as a unit to calculate the running time of the process in time slices. (3) the status of each process can be ready r (ready), run R (Running), or the completion of one of the three states of the F (Finished). (4) ready process CPU can run only one time slice. CPU-time plus 1 to represent.