Transformation Calculations

This guide explains the demand-driven logic used for transformation calculations within the LEAP framework, detailing how requirements flow from final demands to primary resources through a sequence of modules.

• Transformation calculations operate on a demand-driven basis, where modules are run to satisfy domestic requirements and export demands, minus any minimum specified imports. The process begins with the module closest to demands, where domestic requirements match final demands.
• The calculation process iteratively adjusts domestic requirements by subtracting the outputs of a module and adding the necessary input fuels. This sequence continues until the requirements for primary resources, both fossil and renewable, are determined and can be compared against Resource branches.
• The sequence of modules in the tree affects the calculation results; therefore, modules must be ordered correctly. For example, an electric transmission & distribution module must be positioned above an electric generation module.

APA

Stockholm Environment Institute (n.d.). Transformation Calculations. https://cdn.leap.sei.org/help24/Transformation/Transformation_Calculations.htm

Chicago

Stockholm Environment Institute. Transformation Calculations. n.d. https://cdn.leap.sei.org/help24/Transformation/Transformation_Calculations.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Transformation Calculations |url=https://cdn.leap.sei.org/help24/Transformation/Transformation_Calculations.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendtransformation, author = {{Stockholm Environment Institute}}, title = {{Transformation Calculations}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/help24/Transformation/Transformation_Calculations.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }