... system. The box around the system shows what internal operations are constructed and on the exterior, who completes them. It displays the actors of the system and lists how these are done. The note documentation was added to make the diagram clearer to read and understand. Sequence Diagram: This diagram helps to show the interaction between the classes in a sequence (vertically). The objects and classes that take part in the interaction are shown horizontally. As you can see from this example, the actor is the sales clerk and the use case which was investigated is the 'Book equipment item for event'. It shows all the stages starting with adding the booking. State Chart: A state chart shows all the possible states of a class, from the start to the end. In each of the states, the action is also labelled. One of the problems encountered is that I was unable to link the ...

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