1. The basic contents of mathematical analysis methods are mathematization, modeling and computerization. From a mathematical point of view, many practical means have been found in mathematics, such as linear programming, integer programming, dynamic programming, game theory, queuing theory, inventory model, scheduling model, probability statistics and so on. It plays an important role in promoting quantitative analysis and decision-making. From the point of view of modeling, every mathematical means contains a specific mathematical model to solve decision-making problems, and people can find the answers to the questions they need to know with the help of the model; From the point of view of computerization, people can borrow an electronic computer as a fast logical calculation tool to shorten the time to solve problems and enhance the accuracy of prediction. These "three modernizations" are interrelated, and their combination has greatly changed the technology and method of decision-making.

2. Another level: undetermined coefficient method, method of substitution and mathematical induction.