Abstract
This chapter provides information regarding the design of the global forest products model (GFPM) and its implementation as a system of computer programs. The chapter provides an overview of the GFPM software structure in terms of the overall processing flows and the main components of the GFPM. The main components of the GFPM are data preparation, data processing, and output retrieval. The data preparation is done with Microsoft Visual Basic Application macros in INPUT.XLS, and the user interface is the Excel Spreadsheet WORLD.XLS. The data-processing component is (price endogenous linear programming system (PELPS) IV, which reads data in ASCII format to construct an MPS file. The output-retrieval component consists of Visual Basic Application macros, which convert the ASCII output from the data-processing component to figures and tables in Excel spreadsheets. The chapter provides role of batch files in controlling the execution of the GFPM programs, and details the sequence of program execution corresponding to each of the main menu options of the GFPM. The chapter also discusses each component including the main programs in that component, the control mechanism, and the data flow. It also deals with the description of individual programs, procedures, or functions focusing on their functionality, input/output, and processing mechanism.
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