Each time IT explores a new domain or business area, it is inevitable that we have to develop a new set of tools to support that methodology. For example, relational database development spurred the development of entity-relational diagrams (ERDs) and object-oriented design spurred the development of object-class diagrams. Each of these environments required the development of new tools appropriate to the job at hand. But while new domains ultimately require new tools, our first instinct is to reuse existing tools and adapt them for the new domain.