Why Scheduling criteria (turnaround time, waiting time, throughput) in Operating Systems? - Purpose & Use Cases

The Big Idea

What if you could make every waiting minute count less and get more done smoothly?

The Scenario

Imagine you are managing a busy restaurant kitchen where multiple orders come in at the same time. You try to cook each dish one by one without any plan, just picking orders randomly.

The Problem

This random approach causes some dishes to take too long, customers get frustrated waiting, and the kitchen gets overwhelmed. You lose track of which order should be done first, leading to wasted time and unhappy customers.

The Solution

Scheduling criteria like turnaround time, waiting time, and throughput help organize the cooking order efficiently. They guide you to finish orders faster, reduce waiting, and serve more customers smoothly.

Before vs After

✗ Before

Cook orders as they come, no plan
Order1 -> Order3 -> Order2

✓ After

Use scheduling criteria
Order1 -> Order2 -> Order3 (minimize waiting and turnaround time)

What It Enables

It enables smooth, fair, and efficient handling of multiple tasks so everything gets done faster and customers stay happy.

Real Life Example

In a hospital, scheduling patient tests and treatments using these criteria ensures patients spend less time waiting and more time getting care, improving overall service.

Key Takeaways

Scheduling criteria help prioritize tasks to reduce delays.

They improve overall system efficiency and fairness.

Understanding these helps manage resources better in real life and computers.