A picture is worth a thousand words. Does that mean that a model is worth a thousand requirements? A thousand test cases? Not exactly, but a model will tremendously aid in the development of requirements and test cases, and help facilitate inter-team communication of requirements and test cases; at least, that's always the intent.

One way to help ensure that these good intentions come to fruition is to test the diagrams that the model is composed of, for 4C compliance - completeness, correctness, consistency, and clarity.

There are different languages for producing models, but this presentation focuses on the Unified Modeling Language (UML), and methods of testing models that are created with UML.