Elevator System — Notes

Functional

• Hall calls + car calls.
• Multiple cars dispatched optimally.
• Door operation, weight, safety.
• Firefighter / maintenance mode.

Non-functional

• Real-time response.
• Safe by design — fail-secure brakes.

Patterns

• State, Strategy, Observer, Command (calls).

Refs

• "Elevator Scheduling Algorithms" papers; SCAN / LOOK survey.
• Otis / Kone engineering whitepapers.