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Object Diagrams
An object diagram models the objects in a system at some specific point in time. The
term snapshot is sometimes applied to object diagrams, because they can be thought
of as being like photographs that show exactly what things were like when the
snapshot was taken.
In analysis, we can use sequences of object diagrams to show how actions change the
state of the system – by creating new objects, changing their attribute values, inserted
them into relationships with other objects and so on.Object diagrams are woefully underutilized in many projects.
The important things to remember about object diagrams are:
• They are good for “collecting data” on a business problem
• They are good for understanding how actions effect objects
• They are good for testing our models – they are the UML equivalent of test
data