In what cases should BPMN, Sequence, and component diagrams be used? Are you familiar with C4?

BPMN (Business Process Model and Notation) is used for modeling business processes when it is necessary to visually describe the sequence of actions, participants, and events within business operations. It helps to understand and optimize processes.

Sequence diagrams are used for detailed description of interactions between objects or system components over time, showing the order of calls and messages. They are useful in designing and analyzing interaction logic.

Component diagrams show the structure of the system at the component level and their relationships, helping to understand architecture and dependencies between modules.

C4 is an approach to visualizing software architecture, consisting of 4 levels: context, containers, components, and code. It allows for a sequential unveiling of system details, starting from a general overview and ending with the internal structure of components. Familiar with C4, I find it convenient for communication with different audiences, as it structures architectural artifacts by levels of detail.