Example: Sequence Diagram Realizing a Use-Case Scenario
A sequence diagram that describes how business entities and business workers interact in order to realize a use-case scenario.
Relationships
Main Description

This sequence diagram describes how a single business use case scenario is realized. It lives in a Business Use-Case Realization and shows how a purchase specification is created in an organization.

The End User Manager actor starts the flow by having the Systems Specifications entity prepare the specification. This indicates that there's a document or database that supports the operation Prepare system specification, probably by allowing the document to be created. The End User Manager then uses the Update specification operation to add information to the spec.

The sequence diagram also shows hierarchical operations. The IT Project Manager at one point requests that the Legal Officer perform Supplement tender with legal terms. In order to fulfill that operation the Legal Officer must do a contract search, make sure the legal language is valid, and supplement the specification with legalese.

file:///C:/Documents%20and%20Settings/Administrator/Desktop/workers_and_entities_interacting.jpg

More Information