The weight calculation formula is x = (x1f1+x2f2+... xkfk)/n. Weight is a relative concept, aiming at a certain index. The weight of indicators refers to their relative importance in the overall evaluation. Weight is to distinguish weights from several evaluation indexes, and the weights corresponding to a group of evaluation index systems constitute a weight system.

Generalization of formula

Mathematical formula is an expression method that people find some connection between things in nature and express it in some way. It represents the equal or unequal relationship between the quantities of different things in nature, accurately reflects the internal and external relations of things, and is the basis for us to reach another thing from one thing, so as to better understand the essence and connotation of things.

Lack of boundary conditions: rigorous scientific theory is clearly defined in a limited scope, and clearly points out when and where the prediction phenomenon is applicable and when and where it is not applicable. Is a feature of the wrong formula.