Web Engineering has become an important research area, due to the unceasing growth of web sites and applications. New challenges must be faced to provide correct solutions to the problem of defining a precise process to go from requirements to a final software product of quality, all this in the context of a sound web-oriented software technology. This situation is influencing all the conventional areas of software engineering, that must be properly adapted to the particularities of Web Applications. For instance, UML-based Web Engineering, need of new mechanisms and techniques for elicitating and representing user requirements for the Web, methods for web-based development and web-based conceptual modeling, methods to evaluate the quality of web application production process and the quality of web products,... among others are issues that require solutions from both the development and the quality assurance point of view.