The PreDI matrix-a common terminology for offsite construction: definition, verification, and demonstration in environmental impact studies

Abstract Given the increasing interest in offsite construction and the prefabricated components it produces, this paper aims to establish a common matrix, the PreDI, for the offsite construction industry. The effort is to enhance the comparability of research and practices in offsite construction, making it more universally understood. Offsite construction involves manufacturing components in a factory and then assembling them on-site. It is considered a more sustainable approach due to less material usage, energy consumption, and waste generation during component fabrication. However, the lack of common terminology for offsite construction poses many challenges in the industry and its research, hindering communication and research. The Prefabricated Dimensions and Integrations (PreDI) matrix, developed in the study, provides a solution for industry and research use. Thus, industry and academia can utilize the PreDI widely, accurately, and precisely in communication. This paper demonstrates the PreDI matrix’s application in life cycle assessment research on offsite construction, showcasing its utility and setting the stage for more robust research analyses in the future. Using the PreDI matrix in 24 U.S. Department of Energy Solar Decathlon houses further highlights its potential in the industry. Finally, the paper concludes with a broader outlook on its impacts on offsite construction.