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Visual Guide to Round Robin Scheduling (With Interactive Demo) When I first studied CPU Scheduling, I understood the theory… FCFS. SJF. Round Robin. But when I tried solving problems, I kept getting confused. Why does waiting time increase? Why does context switching change everything? Why does Round Robin “feel” fair but sometimes perform worse? So I built a small interactive visualizer to see what actually happens. Why Round Robin Is Often Misunderstood On paper, Round Robin sounds simple: Each process gets a fixed time quantum. If it doesn’t finish, it goes back to the queue. Repeat. But the moment you simulate: Arrival times Different burst times Small vs large quantum Things become less obvious. What actually matters visually is: The order of execution Context switches Idle time Accumulated waiting time And that’s hard to feel just by reading a textbook. Seeing the CPU Timeline Changes Everything Instead of imagining it, I created a Gantt-style visual timeline where: The active pr