This technical supplement to the SNAP Employment and Training (SNAP E&T) evaluation interim reports presents details of the authors' technical approach for creating analysis variables and estimating impacts of treatment group services on outcomes, including employment, earnings, and SNAP participation. It also describes the statistical approach for measuring participants' receipt of services and the costs grantees incurred when planning the pilots and providing services. The supplement begins with an overview of the evaluation design and data sources. Next, it discusses imputation procedures used when constructing the analysis data files (Chapter II). It then explains the construction of analysis weights (Chapter III), followed by the approaches used to estimate statistics measuring individuals' participation in services and activities (Chapter IV). The supplement then describes the approach used to estimate impacts for all individuals enrolled in the pilot and for subgroups of individuals (Chapter V). Finally, it discusses the approach used to measure and analyze pilots' planning and implementation costs (Chapter VI). This supplement describes the technical approach used to produce findings presented in the 10 pilot-specific interim evaluation reports and cross-pilot summary report. [For the Interim Summary Report, see ED620376.]