The software industry developed what became UML diagrams in the mid-’90s. Since then, they have used them throughout businesses to help developers plan their work. Today, they are common not only in the software industry but in many other areas, and knowing what one is may save you a great deal of time in the future.
In this article, we will discuss everything you might want to know about such a diagram and how to use one.
What Is a UML diagram?
In the late 20th century, many software companies grew in prominence. Various engineers moved between said companies regularly.
Soon enough, the industry needed to form several standards for how it developed its work. This would allow them to share good practices and speed up development.
As such, the industry created a system of visualizations over several years of collaboration. These graphs included information developers need to understand a system’s data relationships. Using this, they could develop a framework for building that software or debug it quickly.
These days, developers use UML diagrams for more than software development. They also use a simplified version to display an office or team hierarchy or other purposes. Many use it to indicate any relationship diagram.
A detailed UML diagram, however, is generally used for software alone. Due to the nature of what people intend to display within it.
What Would You Use One For?
There are two primary types of UML diagrams, structural and behavioral diagrams, and people use them for different purposes.
Behavioral diagrams show what should happen in a system and how different parts interact or behave. For example, an activity diagram is one form of a behavioral diagram that shows each part of a step-by-step process. A use case diagram is another type that describes each of the components in the diagram and how they relate to each other.
Structural diagrams instead describe the objects in the system; they do not detail how they would interact. They may detail a set of steps or list several objects and what they contain but relate their data to the current state of the application. This is instead of about other objects.
There are many other types of UML diagrams, some of which go into much more information. For additional information on these, many sites can help you understand the nature of different UML diagrams. Sites such as https://setapp.com/how-to/uml-diagram-guide give good examples of how to create them.
How Do I Make One?
To put together a UML diagram, you should start by breaking down what you are trying to map out. Define it by its parts, as these will become the body of the elements in the diagram.
If this is a piece of software, it would represent the different classes or objects in the software. Alternatively, if it is a structure diagram, it would represent all the roles in the company or group.
After this, you should determine how the items in your diagram move work or data between one another. If this were a work structure diagram, this could display the delegation of responsibility. Alternatively, it would relate to the movement of a single development item if this were a workflow UML.
AA software could display data passing from one class to another in a UML diagram. Also, you can use UML diagrams to show whether a class inherits its traits from elsewhere in the program or not.
There are standards for exactly how to display these relationships. If you want to continue learning, you can find more details on how to do this elsewhere.
Generally, UML diagrams “flow down,” so the item with the highest importance sits at the top and left. After working through these relationships, you should have a solid idea of how to organize the diagram.
What Goes in These Boxes?
When you have determined the flow of information and the objects to be in the UML diagram, the next step is to list all the items’ functions. In a corporate diagram, this might be a list of the individuals who take up that position of responsibility. In software, these would be all the attributes and operations within the class.
Inserting these into the diagram will display how attributes and operations feed down through the system. You will be able to determine items that inherit from the higher-level objects.
You will also determine whether various UML objects must inherit values from elsewhere that you did not consider before following this process.
Finally, at this stage, you should have a complete UML diagram. As you have attached every technical item, you can add notes and clarifications for others who may use it. So long as you have the basics already listed, it would help if you ended up with a useful document for others to use.
More Learning
Now that you understand the basics of a UML diagram and what it takes to build one, you should be ready to discuss these concepts with your company.
Be aware that there is far more to UML diagrams than this article can cover. For additional information on understanding technical concepts such as this, visit our blog.
