Passport Status Tracking System - Sequence Diagram

A sequence diagram is a type of interaction diagram because it describes how—and in what order—a group of objects works together.
These diagrams are used by software developers and business professionals to understand requirements for a new system or to document an existing process.
Sequence diagrams are sometimes known as event diagrams or event scenarios.

sequence diagram

Benefits of sequence diagrams

Sequence diagrams can be useful references for businesses and other organizations. Try drawing a sequence diagram to:

Represent the details of a UML use case.
Model the logic of a sophisticated procedure, function, or operation.
See how objects and components interact with each other to complete a process.
Plan and understand the detailed functionality of an existing or future scenario.

The following scenarios are ideal for using a sequence diagram:

Usage scenario: A usage scenario is a diagram of how your system could potentially be used. It's a great way to make sure that you have worked through the logic of every usage scenario for the system.
Method logic: Just as you might use a UML sequence diagram to explore the logic of a use case, you can use it to explore the logic of any function, procedure, or complex process.
Service logic: If you consider a service to be a high-level method used by different clients, a sequence diagram is an ideal way to map that out.