Abstract: An engineering lifecycle cost estimation system, or EDGE System. The engineering lifecycle cost estimation system allows users to make engineering decisions based on graded evaluations of lifecycle costs (“EDGE”). Embodiments of the EDGE System allow users to analyze major design options during initial system development, optimize system details during final system development and construction, and manage system operation and maintenance over the life of the system. Embodiments of the EDGE System allow users to define a system in terms of the components included in the system, define alternative systems, calculate lifecycle costs for a system or component, and visualize the lifecycle costs, timelines, and other information for systems and components. The visualizations allow users to easily analyze and compare alternative systems or components and make informed decisions.