Each point represents the sum of some ability values, and the sum of each person's ability in that area is divided by the sum of the maximum ability to get a ratio. Then the ability point of that area is at the proportional point of the connecting line between the center point and the end point of the Pentagon. When these five points are found and connected, a pentagonal analysis diagram is made. The farther the analysis diagram goes, the higher the corresponding value is.

The pentagonal radar chart is used to compare the numerical changes of each data relative to the central point, present the characteristics of multiple data in the form of "spider web", and use trend analysis to grasp the key points. In the commercial field, radar charts are mainly used for comparison with other competitors, company advantages and advertising investigation, including radar charts, marked radar charts and filled radar charts.