Kone fail indicator (2) "This elevator needs to be fixed!"
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Kone fail indicator

The elevator algorithm is a simple algorithm by which a single elevator can decide where to stop, is summarized as follows:

  • Continue traveling in the same direction while there are remaining requests in that same direction.
  • If there are no further requests in that direction, then stop and become idle, or change direction if there are requests in the opposite direction.
The elevator algorithm has found an application in computer operating systems as an algorithm for scheduling hard disk requests.

Modern elevators use more complex heuristic algorithms to decide which request to service next. A good example is elevator destination dispatch. It uses an algorithm to decide which car to assign to where and best service times.

Destination dispatch elevator algorithm

Based on information about the trips that passengers wish to make, the controller will dynamically allocate individuals to elevators to avoid excessive intermediate stops. Overall trip-times can be reduced by 25% with capacity up by 30%.

Controllers can also offer different levels of service to passengers based on information contained in their keycards. A high-privilege user may be allocated the nearest available elevator and always be guaranteed a direct service to their floor, and may be allocated an elevator with exclusive use; other users may be provided with extended door opening times.

Schindler lifts (Dewhurst fixtures 2) "This elevator only serves two floors."
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Drive systems: Traction • Winding Drum • Hydraulic

Types of elevators: Double DeckDumbwaiterFireman'sFreightIncline • PassengerResidentialWheelchair lift

Concept: CapacityDestination dispatchElevator algorithm • Elevator control systemElevator machine room • Elevator maintenance • Elevator monitoring systemElevator modernizationACOP & UCMPMachine room less elevatorMajor alterationsRated speed

Elevator systems, controllers and equipments: Elevator fixtures • Elevator keys • Elevator special modesElevator doorsDoor camDoor interlocks (Interlock wiring communication system) • Door restrictorElevator Inspection CertificateEmergency stop buttonFloor designatorsGate switch • Old Deadman controls • Overspeed governorMotor-generator set & Silicon-controlled rectifier (for DC-powered elevators) • Insulated-gate bipolar transistor (for AC-VVVF-powered elevators) • SelectorTape headRegenerative converter (for AC-VVVF-powered elevators)

See also: List of elevator fixtures guide • List of elevator and escalator companies • Elevator door sill guide (Non-proprietary elevator component door sill guide) • Floor numbering (Unlucky floor numbers) • Elevator incidents and accidents

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