Round robin scheduling assigns CPU bursts to processes in time quantums of 4 time units. It was analyzed that with 3 processes having arrival times of 0 and burst times of 24, 3, and 3 time units respectively, the average turnaround time was 15.66 time units and the average waiting time was 5.666 time units.

1. Round Robin
BY: Adeel Rasheed

2. Round Robin
 Round robin scheduling is similar to FCFS scheduling,
except that CPU bursts are assigned with limits
called time quantum.
 On This Example Quantum Time = 4
Process Burst Time Arrival Time
P1 24 0
P2 3 0
P3 3 0

3. Gantt Chart
Turn Around Time
T.A.T=Termination Time – Arrival Time
Process T.T – A.T T.A.T
P1 30 – 0 30
P2 7 – 0 7
P3 10 – 0 10
Avg T.A.T =
𝟑𝟎+𝟕+𝟏𝟎
𝟑
= 15.66

4. Waiting Time
That’s time who process wait for start execution
W.T = Turn Around Time – Burst Time
Avg W.T =
𝟔+𝟒+𝟕
𝟑
= 5.666
Process T.A.T – B.T Waiting Time
P1 30 – 24 6
P2 7 – 3 4
P3 10 – 3 7