The document discusses key concepts in engineering economy including: - Engineering economy studies how limited resources are allocated to satisfy human wants. It considers how individuals and societies choose to use scarce resources. - Resources include land, labor, capital, and human capital. The origins of engineering economy focused on analyzing the economics of projects like railroad building. - Principles of engineering economy include developing alternatives, focusing on differences, using consistent viewpoints, common units of measurement, considering all criteria, accounting for uncertainty, and revisiting decisions. - The engineering economy process involves defining alternatives, developing cash flows, selecting criteria, analyzing and comparing alternatives, and selecting a preferred option. Accounting can help determine costs, set prices,