It was time-consuming, as well. Those days are gone. Where entire books have been written to describe these concepts, a few well-placed examples are worth considering. Networking modeling takes a different approach to the science of business management. It involves systems modeled as nodes and branches of a network.
Branches are the cable, roads, pipelines, and routes that connect nodes with one another.
The goal is to minimize the length of cable, fuel used, time it takes, distance traveled between nodes. A traveling salesperson needs to visit all clients on a regular basis. A warehouse employee picks items from bins to fill orders received from customers. Each order represents a different trip through the warehouse. All relate to arrivals on the line and servers providing something.