In flow diagrams, which shape is typically used to represent decisions?

In flow diagrams, the diamond shape is used to represent decisions. This is because decisions in a process often involve branching paths based on yes/no questions or multiple choices. When a flowchart reaches a diamond, it indicates that a decision must be made, which leads to different flows depending on the outcome of that decision. This clearly visualizes the logic and flow of the process, allowing users to easily identify where different paths converge or diverge.

The rectangle typically represents processes or actions, while the oval is used for the start and end points of a flowchart. The parallelogram is employed to illustrate inputs or outputs, such as data entering or leaving a system. Understanding the purpose of each shape helps in effectively designing and interpreting flowcharts.