A multi-national company has two manufacturing plants, one in the U.S. and one in another country. Both produce the same item, each for sale in their respective countries.
However, their productivity figures are quite different. The systems engineer thinks this is because the U.S. factory uses more automated equipment for processing while the other uses a higher percentage of manual labor.
Explain how that factor can cause productivity figures to be misleading. Is there another way to compare the two plants that would be more meaningful?