Studying Maintainability on Model-Driven Web Methodologies Francisco José Dominguez-Mayo, María José Escalona, Manuel Mejías and Jesús Torres Abstract QuEF (Quality Evaluation Framework) is an environment to evaluate, through objective measures, the quality of Model-DrivenWeb Engineering (MDWE) methodologies. In this paper, this environment is presented and is used for the eval- uation of the Maintainability in terms of various characteristics on MDWE. Given the high number of methodologies available and proposed over recent years, it has become necessary to define objective evaluation tools to enable organizations to im- prove their methodological environment and to help designers of web methodologies design new effective and efficient tools, processes and techniques and find out how it can be improved and how the quality improvement process could be optimized in order to reduce costs. This evaluation is applied to the NDT (Navigational Develop- ment Techniques) methodology, an approach that covers the complete life cycle and it is mainly oriented to the enterprise environment. 1 Introduction Model-Driven Engineering (MDE) is a paradigm of software development which consists of the creation of models closer to a particular domain rather than concepts of a specific syntax. The domain environment specific to MDE for web engineering is called Model-Driven Web Engineering (MDWE) [9]. The Object Management Group (OMG) has developed the standard Model-DrivenArchitecture (MDA) which defines an architecture platform for proposals based on the Model-Driven paradigm. According to the OMG [15], the goals of MDA are portability, interoperability and F. J. Dominguez-Mayo · M. J. Escalona · M. Mejías · J. Torres () Department of Computer Languages and Systems, University of Seville, Seville, Spain e-mail: fjdominguez@us.es M. J. Escalona e-mail: mjescalona@us.es M. Mejías e-mail: risoto@us.es J. Torres e-mail: jtorres@us.es