Pyramid diagrams have widespread applications in psychology, management, scientific research, and other fields. Common pyramid diagram models include Maslow's Hierarchy of Needs Pyramid Model, Energy Management Pyramid Model, Learning Pyramid Model, and Population Pyramid Model.

Base (Bottom Layer): Carries foundational data or core arguments, supporting the upper logic.
Body (Middle Layer): Breaks down detailed dimensions or progressive deductions, reflecting logical connections.
Tip (Top Layer): Presents core conclusions or global insights, guiding decisions.

Maslow's theory of needs divides human needs into five levels from basic to advanced: physiological needs, safety needs, social needs, esteem needs, and self-actualization needs. Maslow used a pyramid diagram to visually represent the relationships among these five levels.

The Learning Pyramid Model is used to describe different levels in the process of human knowledge acquisition. The model divides learning into two major categories: passive learning and active learning, further subdivided into five levels: listening, reading, audiovisual, demonstration, and practice. By progressively upgrading different learning methods, people can master the learned knowledge more effectively.

Number of Levels: Recommended ≤5 levels to avoid information overload.
Proportion Annotation: Avoid showing only graphics without specific values; key proportions can be annotated at the base/tip.
Trend Comparison: Overlay historical data to show changes in the pyramid diagram structure over time.