Why Class identification (ParkingLot, Floor, Spot, Vehicle) in LLD? - Purpose & Use Cases

The Big Idea

What if you could never lose a car in a huge parking lot again, thanks to smart class design?

The Scenario

Imagine managing a large parking garage by writing down every car's location on paper. You try to remember which floor and spot each vehicle is in, but it quickly becomes confusing and chaotic.

The Problem

Using manual notes or simple lists to track cars and spots is slow and error-prone. You might lose track of spots, double-book a parking space, or waste time searching for a vehicle. It's hard to scale as the garage grows.

The Solution

By identifying clear classes like ParkingLot, Floor, Spot, and Vehicle, you organize the system logically. Each class has its own role and data, making it easy to track and manage parking efficiently and without confusion.

Before vs After

✗ Before

parking_list = [("Floor1", "Spot5", "CarA"), ("Floor2", "Spot3", "CarB")]

✓ After

class Vehicle: pass
class Spot: pass
class Floor: pass
class ParkingLot: pass

What It Enables

This approach enables building a clear, scalable system that can easily handle thousands of vehicles and spots without errors or confusion.

Real Life Example

Think of a shopping mall parking system that shows you exactly where your car is parked on a map app, updating in real-time as cars come and go.

Key Takeaways

Manual tracking is confusing and error-prone.

Classes organize the system into clear parts.

Class identification makes scaling and managing easy.