TECH Signal 135
Elevators
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For engineers designing scheduling systems, the comparison demonstrates that dynamic re-optimization improves distribution, but simple heuristics can outperform complex ones when systems reach saturation. This analysis comes from a single feed, so broader industry consensus is not corroborated.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
The LOOK algorithm, which only travels as high as requested, is the standard expectation, while Otis' RSR algorithm adds scoring factors like load penalties and anti-bunching to optimize assignments.
RSR re-optimizes passenger assignments every 5 seconds, allowing the system to reroute passengers to different elevators if the originally assigned car encounters delays.
LOOK outperforms RSR at high flow rates where elevators are constantly full, and in smaller buildings, demonstrating that complex optimization can degrade under heavy saturation.
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