User experience design depends on finding appropriate combinations of software and hardware to implement the intentions of the designer. The designer's intentions are derived from perceived needs of an audience: a user or group of users whose experience will improve when the design is implemented (see Usability engineering).
Model-driven engineering (MDE) focuses on creating models that capture the essential features of a design. A modeling paradigm for MDE is considered effective if its models make sense from the point of view of the user and can serve as a basis for implementing systems. The models are developed through extensive communication among product managers, designers, and members of the development team. As the models approach completion, they enable the development of software and systems.
The best known MDE initiative is the Object Management Group (OMG) initiative Model-Driven Architecture (MDA), which is a registered trademark of OMG. Another related acronym is Model-Driven Development (MDD) which is also an OMG trademark.
Reference:
http://en.wikipedia.org/wiki/Model-driven_engineering
