Getting Ready: Elevator System

Problem definition

Elevators are essential in multi-story buildings, enabling the efficient movement of people and goods. A typical system includes one or more elevator cars that respond to user requests from call buttons on each floor and destination selections inside the car.

To ensure efficiency and safety, an elevator system must handle requests intelligently, minimize passenger wait times, respect car capacity, and support centralized and decentralized control of multiple cars. The system must also manage concurrent requests, optimize car movements, and provide real-time feedback through displays inside and outside the cars.

Robust safety protocols are critical: in emergencies like power failures or fire alarms, the system may need to ignore inputs and keep doors closed until operation is safe. Handling such scenarios correctly is essential for user protection and reliable operation.

In this LLD interview case study, your focus will be on:

• Multiple elevators coordination: Distributing requests among cars and managing their interaction. ...