Question

why there exists more than one diagram to describe the system? Can we select only one to represent a system? Justify your answer.

Answer 1

While developing a project, we often use system sequence diagrams to illustrate how certain tasks are done between users and the system. These tasks may include repetitive, simple, or complex tasks. The purpose is to illustrate the use case in a visual format.

Diagrams show the things in the modeled system. Multiple diagram maps out the flow of information for any process or system. structural diagrams are used to depict the structure of a system. More specifically, it is used in software development to represent the architecture of the system and how the different components are interconnected

So there are lot of UML Diagram as well like:

• Component Diagram
• Object Diagram
• Package Diagram
• Profile Diagram
• Activity Diagram

All these types of UML Diagrams shows the functionality of each process and components in a system. Its very organized way to store data and properties in different diagram for different methods like class diagram, data flow diagram, process diagram.

we can select only one diagram to represent a system LIKE IN AN Entity - Relationship Diagam buts thats an whole concept .Example:

it is very nice but there is no clear idea in functioning of this system and also if we can use a single diagram for the smaller system project but what about the whole industry we can't include all components of a vast system into a single one as it will look messed up and we also can't figure out the functioning of the system as well.