Well, businesses have been able to use this approach of following simple rules when designing complex systems.For instance,
in telephone networks, when a call is placed from one city to another it has to connect through a number of nodes along the way.
At each point, a decision has to be made: which direction does the call go from here?
Well, a computer program was developed to answer this question based on rules that are similar to the ones that ants use to find food.
Remember, individual ants deposit pheromones and they follow the path that is most reinforced.
Now, in the phone network, a computer monitors the connection speed of each path and identifies the paths that are currently the fastest,
the least crowded parts of the network.
And this information, converted into a numeric code, is deposited at the network nodes.