ESEC/FSE is an internationally renowned forum for researchers,practitioners, and educators to present and discuss the most recentinnovations, trends, experiences, and challenges in the field ofsoftware engineering. Held bi-yearly, ESEC/FSE brings togetherexperts from academia and industry to exchange the latest researchresults, state of the art, and state of the practice. Theconference offers an exciting program of events, including keynotetalks by leaders in the field, technical paper presentations,workshops, tutorials, research tool demonstrations, and a doctoralsymposium on innovative research in software engineering.

ESEC/FSE'05 takes place in Lisbon, a city with a rich andeventful history. According to legend, it was founded by Ulysses;Romans and Moors dwelled here for centuries. In the 15th century,itwas the starting point for several of the sea voyages of theDiscoveries Age that brought East and West closer together. Lisbonhosted the European Capital of Culture in 1994, a World Exhibitionin 1998, and the UEFA Cup in 2004. All these and many other eventsleft their mark, shaping Lisbon into a city that displays old andnew architectural, gastronomical and cultural influences.

This year there were 201 technical paper submissions (thelargest number of submissions to ESEC/FSE). Each submission wasreviewed by at least three members of the Program Committee, and inmany cases four. On the basis of these reviews, the ProgramCommittee accepted 32 full papers for inclusion in the proceedingsand presentation in the technical program. We were pleased that thequality of paper submissions was very high and the ProgramCommittee spent a great deal of time deliberating and discussingfinal decisions in a face-to-face meeting.

Besides the technical papers, we offer research tooldemonst