Model Driven Engineering (MDE) is a software development approach family based on the use of models in the software construction. It allows the exploitation of models to simulate, estimate, understand, communicate and producecode.This paper tries to introduce MDE and presents its actual state. It starts by explaining the industrial world need for such approaches, sheds light on MDE’s principles, examines these principles in practice through a relevant alternative named Model Driven Architecture (MDA) of the Object Management Group (OMG), discusses Microsoft’s Software factories and IBM’s Manifesto MDA versus OMG’s MDA and presents some challenges facing the success of MDE.