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UML FOR JAVA™ PROGRAMMERS by Robert Cecil Martin

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Chapter 2. Working with Diagrams

Working with Diagrams

Before we explore the details of UML, it would be wise to talk about when and why we use it. Much harm has been done to software projects through the misuse and overuse of UML.

Why Model?

Why do engineers build models? Why do aerospace engineers build models of aircraft? Why do structural engineers build models of bridges? What purposes do these models serve?

These engineers build models to find out if their designs will work. Aerospace engineers build models of aircraft and then put them into wind tunnels to see if they will fly. Structural engineers build models of bridges to see if they will stand. Architects build ...

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