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Show HN: Elevators

john.fun

161–170 of 426 posts

Re: Show HN: Elevators

#161
post #69
post #57

Earlier quoted context omitted.

Because most buildings now they just put one button so people stop clicking both

What? I’ve never seen that. The elevator needs to know which way you want to go.

On the ground/lowest floor, there's only one button as there's only one way to go.

Re: Show HN: Elevators

#162
Most importantly, after entering the elevator. First press the close button and then the floor. That way u, safe the time of pressing a button as the door is already closing.

Re: Show HN: Elevators

#163
This was fun to read and play with but I'd like to see it with different usage patterns, too.

The simulator seems to have passengers spawning on a random floor and then transiting to a different random floor. But for where I work, the trips are pretty much always from the lobby to a floor, or from a floor to the lobby. Nobody goes inbetween floors except maybe the cleaners.

Re: Show HN: Elevators

#164
Oh wow, this is perfect reading for me. One of my first college career fair questions was "Tell me how you would program an elevator". Forgot what sad attempt at an answer I gave, but I pretty much thought about that algorithm every time I've ever waited for the elevator. Which was pretty much daily when living in NY.

Re: Show HN: Elevators

#166

Oh my god, every time I'm waiting for the elevator, I think of how annoying it must be to be someone who's building the algorithm to make sure that you minimize the amount of wait times between picking up people and taking them to their destination. Then I also wonder if the people who apply the logic and program the logic into the elevators are actually evil sadists that are doing it on purpose to make us wait longe…

> minimize the amount of wait times between picking up people and taking them to their destination I wish elevators accounted for load. I've been to a couple of larger conferences where on the Monday morning after, the hotel elevator was just hammered. Everyone wanted to go down, and the elevator would dutifully stop on every single floor no matter how full it was. If you were mobility disabled on the 2nd floor, you…

In that case, would it pay to call for an elevator going up, and then remain on it until it's being called down?

Re: Show HN: Elevators

#167
I have destination dispatch at my office, and while I don't like my personal user-experience of it, I can't imagine what would better suit a building when you have so many elevators in the same place i.e. in my case 10+ I think?

What I find annoying though is you clunkily go click a floor then clunkily wait then clunkily walk over to the elevator assigned which may or may not be on the other end of the space. Also another interesting thing I've seen is that it seems in my case the distance from destination selection and elevator assigned seems to reduce at times when the office is emptier so that too seems to def be accounted into the algorithm.

Re: Show HN: Elevators

#168
I currently work in one of the top global incumbent company in the elevator market in R&D software.

I would have never thought there were so many challenges behind a car moving up & down.

This industry is so niche and peculiar.

Elevator trip scheduling is one of the many challenges. Really a great experience so far

Re: Show HN: Elevators

#169
I am wondering where these more complex elevator algorithms are deployed, because I never see them.

I was recently at a Radisson hotel in Germany where I was tried to summon an car, but none would appear for a long time. I believe that someone was keeping the doors open on their floor to wait for someone. The fact that all the other elevators were passing by in both directions was actually a bit infuriating as well.

At that moment I really wished for an algorithm that would recognize when an car spent a significant amount of time on one floor and then reassign the other floors to a new elevator.

Re: Show HN: Elevators

#170

Oh my god, every time I'm waiting for the elevator, I think of how annoying it must be to be someone who's building the algorithm to make sure that you minimize the amount of wait times between picking up people and taking them to their destination. Then I also wonder if the people who apply the logic and program the logic into the elevators are actually evil sadists that are doing it on purpose to make us wait longe…

> minimize the amount of wait times between picking up people and taking them to their destination I wish elevators accounted for load. I've been to a couple of larger conferences where on the Monday morning after, the hotel elevator was just hammered. Everyone wanted to go down, and the elevator would dutifully stop on every single floor no matter how full it was. If you were mobility disabled on the 2nd floor, you…

The article describes the RSR algo which takes load into account.
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