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Embodied energy is the total amount of energy required to produce a product, and is significant because it occurs immediately and can be equal over the life cycle of a building to the transient requirements for operational energy. Methods for embodied energy analysis include process analysis, input-output analysis and hybrid analysis. Proposes to improve the reliability of estimating embodied energy based on input-output models by using an algorithm to extract systematically the most important energy paths for the “other construction” sector from an Australian input-output model. Demonstrates the application of these energy paths to the embodied energy analysis of an individual commercial building, highlighting improvements in reliability due to the modification of energy paths with process analysis data. Compares materials and elements for the building, and estimates likely ranges of error. [ABSTRACT FROM AUTHOR]