Resumen
The article focuses on various problems of Unified Modeling Language (UML) that are faced by IT professionals. UML must integrate structure and behavior in a single model while becoming simpler and more user friendly. UML problems can be sorted into three main categories, model multiplicity resulting from excess diagram types and symbol, confused behavior modeling, and the obscuring influence of programming languages. UML agglomerates nine diagram types, also called views, or models, declared to be the unified standard. But such a declaration cannot replace unification of concepts and symbol sets associated with these models, along with removal of the many redundant entities and overlapping notions. A major problem with UML is the size of its alphabet of more than 150 symbols. One author says that UML is up to 11 times more complex than other Object-Oriented methods. UML is intended for use by software professionals to generate software systems. To be accessible to non-IT professionals, the ultimate consumers of these systems and whose approval is required for the UML based design, UML must avoid programming jargon.