Stock Turnover Analysis

This guide describes the Stock Turnover Analysis methodology within the LEAP software, detailing how to model energy consumption and emissions for both the transport sector and other energy-using technologies based on device lifetimes and vintage-based averages.

• Stock turnover analysis is most effective for energy-using devices with long lifetimes, as changes in the energy intensities or emission factors of new devices take time to influence the average of the total installed stock. It is also applicable when operating characteristics change as devices age, such as vehicles experiencing lower mileage or increased emission factors due to equipment failure.
• In transport sector stock turnover modeling, energy consumption is determined by multiplying the number of vehicles, the annual average mileage, and the fuel economy. LEAP calculates stock average values for fuel economy, mileage, and environmental loadings across all vintages to determine overall energy consumption and environmental impacts.
• Transport stock turnover analysis differs from other demand analysis methods by allowing emission factors to be specified per unit of distance traveled (e.g., grammes/veh-mile) rather than only per unit of energy consumed (e.g., kg/TJ).
• For non-transport energy-using equipment, energy consumption is calculated by multiplying the stock of devices by the energy intensity per device. The process involves specifying current stocks and stock-average intensities in Current Accounts, and projecting future sales and the intensities of newly added devices in scenarios.

APA

Stockholm Environment Institute (n.d.). Stock Turnover Analysis. https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm

Chicago

Stockholm Environment Institute. Stock Turnover Analysis. n.d. https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Stock Turnover Analysis |url=https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendstock, author = {{Stockholm Environment Institute}}, title = {{Stock Turnover Analysis}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }