GE Transportation produces locomotive engines for sale in countries around the world. After looking at the total market for locomotive engines, the company found that various rail lines wanted different types of engines. Major rail lines in the U. S. and South America wanted engines to haul heavy freight. Rail lines in Sweden and Germany were interested in a cleaner, greener locomotive engine. Rail lines operated by several Eastern European countries wanted locomotive engines for running short distances between cities in their own country. GE Transportation is currently manufacturing its GE 4400 for heavy freight, its Hybrid Eco-Engine, and its Dash 9, suited for shortline transport. Refer to Scenario 5.2. Currently, GE uses several sales forecasting methods. One method is to sell the different locomotive engines to buyers in different countries, and then measure the purchasing response in each. In this case, GE Transportation is using the method to forecast future sales.