Hi! How is an ER Diagram different from a Use Case Model? I am really confused between the two?!
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Hi! How is an ER Diagram different from a Use Case Model? I am really confused between the two?!
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They are somewhat unrelated.
An E-R diagram shows how data is related, such as for a database.
A use case diagram shows how a user might use a system.
Ues Case Diagram
1) A use case diagram in the Unified Modeling Language (UML) is a type of behavioral diagram defined by and created from a Use-case analysis.
2) Use cases are used during the analysis phase of a project to identify and partition system
functionality. They separate the system into actors and use cases.
Use cases (A use case describes a sequence of actions that provide something of measurable value to an actor and is drawn as a horizontal ellipse)
Actors(An actor is a person, organization, or external system that plays a role in one or more interactions with the system)
ER Diagram
An entity-relationship (ER) diagram is a specialized graphic that illustrates the interrelationships between entities in a database.