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CSIS 100 – Week 7 Lab 5:  UML Modeling

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“The Unified Modeling Language, or UML, as it is popularly known by its TLA (three-letter acronym!), is the language that can be used to model systems and make them readable. This essentially means that UML provides the ability to capture the characteristics of a system by using notations. UML provides a wide array of simple, easy to understand notations for documenting systems based on the object-oriented design principles. These notations are called the nine diagrams of UML.”



In this exercise, you will be developing the first of the UML diagrams, known as a Use-Case diagram.  Before beginning this lab, be sure to read the articles and watch the videos that are in your Reading & Study folder.




To construct your Use Case diagram, you will use a web-based modeling tool that is found at www.draw.io.  The instructions to use this tool are as follows:

  1.  Open a web browser and navigate to www.draw.io. You will immediately see a screen like the one below that asks you where you want to save your files.  Select “Device” from this screen.



  1. The next screen prompts you to either Create a new diagram or Open an existing diagram.  Click “Create new diagram”.




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  1. This opens a new screen. Just click on the “Blank Diagram” and create a blank diagram.  This opens your template screen to start diagraming.













  1. Click on the down arrow head to the left of the word “General” to collapse the General symbols
















  1. Then click on the arrow head next to “UML” to open the UML symbols.


  1. Drag in as many Actors and Use case symbols as you need for your Use Case Diagram.








  1. When you are ready click of the File-Save As button.  The next screen prompts you to give your diagram a name and to select a template for your diagram.
    1. Name your file using the convention [Your First and Last Name without spaces] followed by “UseCaseDiagram”.
    2. Once you have named the file, Click on the Device icon and it will open your file save as menu










  1. In a three paragraph summary, describe the system you are modelling.  Save this summary in a Word document entitled [Your first name + your last name] + “_Lab 6”.
  2. Create a Use-Case diagram with a minimum of 3 actors and 5 use cases.
  3. Include 1 “extends” relationship in your model.
  4. In the same Word document as your system summary, create use case descriptions for each of the use cases you identified.


The format of your use case descriptions should be as follows:

Use Case Name:
Participating Actors:
Flow of Events:
Alternative Flows:
Entry Conditions:
Exit Conditions:


[For a discussion and example of use case descriptions, be sure to view the articles and videos in your Reading & Study folder.]



Upload your diagram (saved as an xml file) and your Word document containing your summary and use case descriptions to the assignment link in Blackboard by the date specified in your course schedule.

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