1) Industries consider transportation costs of inputs and finished goods to locate in areas that minimize costs. They tend to locate near inputs if they are expensive to transport or near markets if finished goods are expensive to transport.
2) Site factors like land, labor, and capital costs also influence location. Industries prefer cheaper land, labor, power sources, and access to investment capital.
3) Weber's location theory holds that industries locate based on balancing transportation costs, labor costs, and benefits of clustering with other industries.