Answer:
The move from needs stated as use cases to the next, more formal level of refinement is one of the main uses of sequence diagrams.
Step-by-step explanation:
The sequence diagram is generally used to display item interactions in the order in which they take place. Similar to the class diagram, developers frequently believe that sequence diagrams are exclusive for them. Yet, by illustrating how multiple business objects interact, sequence diagrams can be helpful to a company's business people in explaining how the business now operates.
A business-level sequence diagram can be used as a requirements document to express requirements for a future system deployment in addition to detailing an organization's existing affairs. By offering a more formal level of refinement throughout the requirements phase of a project, analysts can advance use cases. Use cases are frequently transformed into one or more sequence diagrams when that happens.
Sequence diagrams are frequently developed from use cases. Sequence diagrams can also be used to describe how elements of an existing (or "legacy") system now interact. This is in addition to their application in the design of new systems. When transferring ownership of a system to another individual or business, this documentation is highly helpful.