Firstly, it uses dimensionality reduction technology to replace the original variables with a few comprehensive variables, and concentrates most of the information of the original variables. Secondly, the objective economic phenomenon is scientifically evaluated by calculating the score of comprehensive principal component function. Thirdly, it focuses on the comprehensive evaluation of information contribution influence in application.

2. Deficiencies

When the sign of factor load of principal component is positive or negative, the meaning of comprehensive evaluation function is not clear. The naming clarity is low.