In spite of all the hate against formal models, most of the problems I have encountered in the last twenty years are much easier to solve when the problem-solvi

In spite of all the hate against formal models, most of the problems I have encountered in the last twenty years are much easier to solve when the problem-solving conversation uses a model as common object. Conceptual data model (I love Merise), process with swimlanes, state machines... Nothing new and still extremely useful. About UML specifically, I never understood the fixation on object orientation: the world looks relational to me !