Model-Driven Engineering (MDE) is an approach to software development that uses models as primary artifacts, from which validation, code, test and documentation are derived. Several metamodels are used in the same process. They range from general purpose ones (e.g.; UML), to domain (e.g.; for real-time systems) and company metamodels. Measurement is an engineering activity that enables to obtain quantitative information on the engineering process or the systems being developed. Measurement of models at an early phase of the development life cycle allows architects and managers to estimate costs, to identify risks and flaws, to validate some properties and to perform early quality assurance. Unfortunately, it is costly to develop an ad hoc m...