Compile the input-output table, establish the corresponding linear algebraic equations, comprehensively analyze and determine the complex relations between various departments of the national economy, and analyze the important macroeconomic proportional relations and industrial structure and other basic issues.

Input-output table: refers to a chessboard table that reflects the source and destination of production inputs of various products.

Input-output model: refers to the linear algebraic equations that reflect the economic content reflected in the input-output table in mathematical form.

The method of studying and analyzing the quantitative dependence between product production and consumption among various departments of the national economy, also known as input-output analysis or inter-departmental equilibrium economic mathematical model, is an important modeling method of system engineering. All production departments need to buy products and pay service fees from other production departments, and also produce products and provide services for other departments. In order to study the quantitative dependence between input and output, various economic activities can be represented by specially designed input-output tables, thus providing a concise and systematic structural model for studying the overall economic activities of a country or region.

Compile the input-output table, establish the corresponding linear algebraic equations, comprehensively analyze and determine the complex relations between various departments of the national economy, and analyze the important macroeconomic proportional relations and industrial structure and other basic issues.

Input-output table: refers to a chessboard table that reflects the source and destination of production inputs of various products.

Input-output model: refers to the linear algebraic equations that reflect the economic content reflected in the input-output table in mathematical form.