Venn Diagram

Venn diagrams are illustrations used in the branch of mathematics known as set theory. They show the mathematical or logical relationship between different groups of things (sets). A Venn diagram shows all the possible logical relations between the sets.

Pyramid Diagram

The Project Management Triangle Diagram depicts three main constraints of any project: scope, time and cost. Projects have to comply with the specified scope, projects should be finished in time and projects need to consume the budget. Each of the constraints represents one side of the triangle, and any change in budget or timing or scope affects the entire diagram.