System Sequence Diagram Vs Sequence Diagram. Activity diagram is used to represent the execution of the process. Ssds are often.
Later we come to design each subsystem namely each element participating in the system use case diagram. Sequence diagram model before code. Sequence diagrams can be somewhat close to the code level so why not just code up that algorithm rather than drawing it as a sequence diagram.
A good sequence diagram is still a bit above the level of the real code.
An ssd shows for one particular scenario of a use case the events that external actors generate their order and inter system events the system is treated as a black box ssds are derived from use cases. An ssd shows for one particular scenario of a use case the events that external actors generate their order and inter system events the system is treated as a black box ssds are derived from use cases. Ssds are often. The system use case diagram is part of this activity.
