We have only begun to understand the experimental nature of software engineering, the role of empirical studies and measurement within software engineering, and the mechanisms needed to apply them successfully. This volume presents the proceedings of a workshop whose purpose was to gather those members of the software engineering community who support an engineering approach based upon empirical studies to provide an interchange of ideas and paradigms for research. The papers in the volume are grouped into six parts corresponding to the workshop sessions: The experimental paradigm in software engineering; Objectives and context of measurement/experimentation; Procedures and mechanisms for measurement/experimentation; Measurement-based modeling; packaging for reuse/reuse of models; and technology transfer, teaching and training. Each part opens with a keynote paper and ends with a discussion summary. The workshop served as an important event in continuing to strengthen empirical software engineering as a major subdiscipline ofsoftware engineering. The deep interactions and important accomplishments from the meeting documented in these proceedings have helped identify key issues in moving software engineering as a whole towards a true engineering discipline.