Reading the November issue of Crosstalk I came across an interesting article on managing Architectural dependencies using a Dependency Structure Matrix (DSM) - rather than dependency graphs induced by UML. The article is called "Dependency Models to Manage Software Architecture" by Neeraj Sangal and Frank Waldman"

The article talks about the value of using DSM technique for managing architecture evolution as requirements change (analyzing ANT as an example) - Apropos "Architecture Evaluation",  I think the DSM technique can also be useful in early stages of the architectural design as a way to infer dependencies and to help promote loose coupling