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Construction industries are bulk generators of waste globally; improper management leads to environmental catastrophes. This paper identifies the significant factors through exploratory factor analysis and presents a novel approach to determining the causal relationships of various factors that lead to waste generation at construction sites by structural equation modelling. The analysis identifies maintaining and managing a site waste-management plan (SMP) as the top factor, with a path coefficient of 0·96. The impacts on waste generation of factors such as the operation stage (0·91), ordering and purchasing stage (0·84), hauling and handling stage (0·76), material handling stage (0·73), documentation (0·60) and culture (0·46) are quantified. Appropriate documentation provides the framework for SMP, on the basis of which other mitigation measures may be enforced, thus reinforcing the analysis results of SMP variables. Standardised documentation procedures for SMP need to be initiated and incentivised within existing green building performance rating frameworks, such as Green Rating for Integrated Habitat Assessment and Leadership in Energy and Environmental Design–India. [ABSTRACT FROM AUTHOR]