Modelling object-oriented software – an introduction
Modelling object-oriented software – an introduction

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Modelling object-oriented software – an introduction

9 Conclusion

This course has introduced you to the ideas and techniques involved in forming a conceptual model of a system domain and in particular a conceptual model for the Hospital System.

Starting with a requirements document for a system, you have worked through the processes necessary to produce the conceptual model. The course has also introduced some of the UML notation for class and object diagrams.

In producing the conceptual model, you have learnt how to analyse a requirements document to identify classes and associations appropriate for modelling the system domain, together with their respective attributes and multiplicities. You also learnt about the value of generalisation relationships in capturing the characteristics common to related classes and how this might lead to the identification of abstract classes.

You have seen that objects, attribute values and links may be subject to constraints in the form of invariants, and that attributes and associations can sometimes be derived from other attributes and associations, using invariants.

Choices have to be made during this phase of the software development process, and you have seen that there is no one correct conceptual model for a system.

Finally, the course ended by bringing together all the pieces of the Hospital System's conceptual model.

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