Today we are ever more concerned about quality software products. Organizations follow a variety of software development process models and apply various quality management techniques to produce better software. But quite often, the effectiveness of these development processes is questioned and their impact on the quality of the resulting software product. We need to know if we have made any improvement in this regard and what can else has to be done. Software measurement when applied to these processes or products can answer such questions very effectively.Software measurement and metrics are key technologies to manage and to control software development projects. Measurement is essential for any engineering activity, by increasing the scientific and technical knowledge for both the practice of software development and for empirical research in software technology. This conference is aimed at facilitating the exchange of software measurement experiences, their theory and practice among researcher.These proceedings of the joined conferences, the 16 th International Workshop on Software Measurement (IWSM 2006) and the DASMA MetriKon 2006, try to reflect a bit of all the concepts developed and the experience gained by working with software measurement. They are of particular interest to software engineering researchers, as well as to practitioners, in the areas of project management and quality improvement programs, for both software maintenance and software development.33 interesting papers, presented in English or in German, have been chosen out of more than 50 submissions. They deliver an overview of the state of the art in software metrics and estimation.