Round Robin, confused about how to processes are handled related to arrival order
In round-robin scheduling, every process is put into a big queue as soon as they arrive. When a process gets to the front of the queue, it is treated for some fixed number of time-steps (in your case 3 steps, as I suppose is also what's meant by the text &quot;Quantum = 3&quot;). If the process is not finished when its time is up, it gets stowed in the back of the queue. So when Process 5 is done at step 12, it gets stowed in the back of the queue, behind all the processes that arrived at step 11.