If business is now a global affair, then the export-import business is important, lucrative and necessary. An export-import agent is not a broker --- the agents are lower on the business totem pole.
Most properties are measured using a number and a unit of measurement. The unit of measurement is a standard amount. The number compares the property to that standard amount. This means a tree that is ten times as tall as a meter stick is 10 meters tall.
Measurement is the process observing and recording the observations that are collected as part of a research effort. There are two major issues that will be considered here. First, you have to understand the fundamental ideas involved in measuring. Here we consider two of major measurement concepts.