When you take any process, the process is going to have various times-
Arrival Time of process(AT) or submission time- The time when the process arrives into ready state is Arrival Time(AT).
Burst Time of process(BT)- The time required for the process for its execution is Burst Time(BT).
Completion Time of Process(CT)- The time when the process completes its execution is completion time(CT).
Turnaround Time(TAT)- The time difference between completion time and arrival time is TAT.
WT= TAT-BT Total Interval(TAT)= Useful Time(BT)+ Wait Time(WT)
Response Time(RT)- The first responded time or first scheduled time of process.