Use-case Diagrams

Use-case

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Image Removeddiagrams are used to show which actors within a domain can perform what actions. The diagram contains all of the actors on the left-hand side, the system in a central box and any external actors that do not perform any user actions on the right-hand side. All actions that the actors perform are inside the central box and have a line to either crewmember or viewer to represent who can perform that specific user action.

Use case diagram

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The use-case diagram for Regterschotracing looks like this, with the viewr and crewmember that were mentioned in the domain model now acting as actors that interact with our system. A view can watch a race and enjoy the enticing race from the comfort of their own couch. A crewmember has to analyse the data from the racecar in graphs that are placed in tabs whilst watching a race, so there's two distinct user-actions that solely crewmembers can perform. Furthermore, the graphs that are used by a crewmember connect to an external actor, the broker. This is a servie that can send a long stream of data to our application without requiring constant requests for fetching said data.

The <<CRUD>> and <<CRD>> indicate that this particular use-case is a collection of multiple use-case that closely relate to one another.

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Use case diagram Tabs CRUD

The <<CRUD>> and <<CRD>> would look like the diagram below when expanded. The CRUD acronym stands for Create, Read, Update & Delete. This simple collectivisation shows that an actor can interact with a certain use-case, in this case a tab. They can add new tabs, they can read the data that is present within the tabs, they can update the tab by adding new graphs or removing graphs and they can delete tabs by removing them from the view.

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During the development for the user tabs we got into an argument on how we were going to display the tabs a user can have. We came to the conclusion that it would be easier if we were to store the tabs in the database. This way the crewmembers don't have to recreate the tabs every time they would login. Also, this way every crewmember could design their dashboard the way they find easy to read.

Use Case Descriptions

View Graphs

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