Did you use state diagrams often?

State diagrams are useful for modeling the behavior of a system or component, especially when it is important to track transitions between states and reactions to events.

If state diagrams were not used in the project, it might be because:

• The system was simple enough and did not require detailed state descriptions.
• Other modeling methods were used, such as activity diagrams or sequence diagrams.
• The team preferred lighter approaches to documentation.

Nevertheless, state diagrams help better understand the logic of operation, especially in systems with a large number of states and transitions.