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Show HN: Elevators

1668 points · 413 comments · Jrh0203

  1. olex · · focus · HN ↗
    The biggest problem I always have with elevators is not the algorithm, it's the people seemingly being unable to grasp the concept of pressing either the up or the down request button, depending on where they want to go. Almost always I find someone will press both, because "then the elevator comes faster". Completely ignoring the fact that they end up going the wrong way first half the time, and adding an unnecessary halt for everyone already in there. How hard can it be to understand?..
    1. Georgelemental · · focus · HN ↗
      I don't think I've ever seen someone do that
      1. tamimio · · focus · HN ↗
        Because most buildings now they just put one button so people stop clicking both
        1. what · · focus · HN ↗
          What? I’ve never seen that. The elevator needs to know which way you want to go.
          1. userbinator · · focus · HN ↗
            It doesn't; it just needs to know it was called. You make your selection once it arrives.

            Look up the early history of elevators and you'll see a progression from fully manual in-car up/down controls (often with a dedicated human operator); various semi-automatic systems with minor improvements like automatic leveling and door control; and then operatorless systems that started with nondirectional calls:

            <a href="https:&#x2F;&#x2F;liftescalatorlibrary.org&#x2F;paper_indexing&#x2F;papers&#x2F;00000073.pdf" rel="nofollow">https:&#x2F;&#x2F;liftescalatorlibrary.org&#x2F;paper_indexing&#x2F;papers&#x2F;00000...

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