Useful interaction diagrams
Use case Diagram
(From TOGAF) A Use-Case diagram displays the relationships between consumers and providers of Business/Application services.
Services are consumed by actors or other services and the Use-Case diagram provides added richness in describing business capability by illustrating how and when that capability is used.
Flow Charts (BPMN)
Also called Process Flow Diagrams, Activity Diagrams (UML), and Swimlane Diagrams, Business Process Modeling Notation (BPMN) is a flow chart method that models the steps of a planned business process from end to end.
Flow charts may utilize swim-lane techniques to represent ownership of process steps and typically include controls, triggers and sub-processes.
Flow charts can also be modelled from the perspective of a user in UX/UI, via:
- Customer Journey Maps
- Task flows
A Sequence Diagram visualises the interactions between objects for a given scenario, in sequential order.
Learn more here.