Interactive explainer shows how elevator scheduling algorithms reduce wait times across single- and multi-car systems

The article explains why elevator behavior can feel unpredictable, starting with simple SCAN and LOOK algorithms and then moving into multi-elevator coordination. It highlights how system performance is measured through wait-time distributions, including p50 and p90 metrics, rather than simple averages.

Elevator scheduling illustrates how everyday infrastructure depends on optimization techniques similar to those used in computing, logistics, and ride-hailing. As buildings get denser, smarter dispatch algorithms can meaningfully improve perceived service quality without adding more hardware.