### Good to the Last Drop

The Ups and Downs of Making Elevators Go

Here is a typical problem: A passenger on the sixth floor wants to descend. The closest car is on the seventh floor, but it already has three riders and has made two stops. Is it the right choice to make that car stop again? That would be the best result for the sixth-floor passenger, but it would make the other people’s rides longer.

For Ms. Christy, these are mathematical problems with no one optimum solution. In the real world, there are so many parameters and combinations that everything changes as soon as the next rider presses a button. In a building with six elevators and 10 people trying to move between floors, there are over 60 million possible combinationsâ€”too many, she says, for the elevator’s computer to process in split seconds.

“We are constantly seeking the magic balance,” says the Wellesley math major. “Sometimes what is good for the individual person isn’t good for the rest.”

## 1 Comment so far

1. Uncle Al on December 5th, 2012

Put a long mirror by each elevator bank. People will preen, redirecting time delay issues. Touch screen-steerable cameras looking down from the roof will do it. Solve it locally, in the trenches, before it becomes complex. Solve it out outside the box. Centralized solutions are terrible solutions. Management obsesses on what is measurable instead of promoting what is important.

http://www.mazepath.com/uncleal/comprom.htm
http://arxiv.org/abs/1102.2837
http://www.realinnovation.com/archives/2003/12/d/04.pdf
Competence – what a concept! Teoriya Resheniya Izobreatatelskikh Zadatch