This report documents the dynamic world policy simulation (DWOPSIM) model building framework. DWOPSIM, a set of DOS batch computer programs and spreadsheet templates, allows users to assemble globally consistent data sets into time series models. Such models are used for policy analysis, short—term forecasting, and long—term projections. Users choose equations and code the structure along with model parameters into spreadsheet templates. DWOPSIM provides computer programs for the generation of model equations, the calculation of constant terms, the assembly of spreadsheet components into a linked global model, and the generation of simulation output.