It was 1999 when Extreme Programming Explained was ?rst published, making this year's event arguably the ?fth anniversary of the birth of the XP/Agile movement in software development. Our fourth conference re?ected the evolution and the learning that have occurred in these exciting ?ve years as agile practices have become part of the mainstream in software development. These pages are the proceedingsof XP Agile Universe 2004, held in beautiful Calgary, gateway to the Canadian Rockies, in Alberta, Canada. Evidentintheconferenceis thefactthatourlearningis still inits earlystages. While at times overlooked,adaptation has beena core principleof agile software development since the earliest literature on the subject. The conference and these proceedings re- force that principle. Although some organizations are able to practice agile methods in the near-pure form, most are not, re?ecting just how radically innovativethese methods areto thisday. Anyinnovationmustcoexistwithan existingenvironmentandagileso- ware development is no different. There are numerous challenges confronting IT and software development organizations today, with many solutions pitched by a cadre of advocates. Be it CMM, offshoring, outsourcing, security, or one of many other current topics in the industry, teams using or transitioning to Extreme Programming and other agile practices must integrate with the rest of the organization in order to succeed. The papers here offer some of the latest experiences that teams are having in those efforts. XP Agile Universe 2004consisted of workshops,tutorials, papers, panels, the Open Space session, the Educators' Symposium, keynotes, educational games and industry presentations.

This book constitutes the refereed proceedings of the 4th Conference on Extreme Programming and Agile Methods, XP/Agile Universe 2004, held in Calgary, Canada in August 2004. The 18 revised full papers presented together with summaries of workshops, panels, and tutorials were carefully reviewed and selected from 45 submissions. The papers are organized in topical sections on testing and integration, managing requirements and usability, pair programming, foundations of agility, process adaptation, and educational issues.

The second XP Universe and ?rst Agile Universe brought together many p- ple interested in building software in a new way. Held in Chicago, August 4–7, 2002 it attracted software experts, educators, and developers. Unlike most c- ferences the venue was very dynamic. Many activities were not even well de?ned in advance. All discussions were encouraged to be spontaneous. Even so, there were some written words available and you are holding all of them now. We have collected as much material as possible together into this small volume. It is just the tip of the iceberg of course. A reminder to us of what we learned, the people we met, and the ideas we expressed. The conference papers, including research and experience papers, are rep- duced in these proceedings. Forty-one (41) papers were submitted. Each subm- ted paper received three reviews by program committee members. The program committee consisted of 40 members. Papers submitted by program committee members were refereed separately. This ensured that reviewers could provide an honest feedback not seen by the paper submitters. In many cases, the program committee shepherded authors to signi?cantly improve their initial submission prior to completing the version contained in these proceedings. In the end, the program committee chose 25 papers for publication (60% acceptance).

XPAgileUniverse2003isthethirdconferenceinaseriesrunninginNorthA- rica and attracting participants from all over the world who are interested in the research, development and application of agile software processes. Agile app- aches value people and interaction over processes and tools – moving software engineering from the process-oriented software development approaches of the 1990s towards people-oriented approaches that we are starting to see more and more in this decade. Agile approaches stress a holistic view of software deve- pers as being involved in analysis, design, implementation and testing activities, while more traditional, tayloristic approaches separate these tasks and assign them to di?erent “resources. ” Tayloristic approaches create knowledge-sharing problems as information gathered by one person needs to be handed over – usually in the form of documentation – to the next person in the chain. Agile approaches reduce the number of hand-o?s and, thus, decrease the amount of required documentation for knowledge sharing. While deemed a novelty only a few years ago, agile methods are now be- ming established in the software industry and are being applied in more and more application domains. While agile approaches move into the mainstream of software organizations, we are only now beginning to understand their bene?ts, areas of applicability, and also their dangers. This year’s conference will increase this understanding and provide a better base for industry practitioners as they assess the e?ectiveness of agile methods in their environment.

This book constitutes the refereed proceedings of the XP / Agile Universe 2003 Conference held in New Orleans, LA, USA in August 2003. The 17 revised full papers presented together with abstracts or papers from an educator symposium and workshop summaries were carefully reviewed and selected from 35 submissions. The papers are organized in topical sections on becoming agile, agile methods and processes, agile testing, and tool support for agile teams.

This book contains the refereed proceedings of the 11th International Conference on Agile Software Development, XP 2010, held in Trondheim, Norway, in June 2010. In order to better evaluate the submitted papers and to highlight the applicational aspects of agile software practices, there were two different program committees, one for research papers and one for experience reports. Regarding the research papers, 11 out of 39 submissions were accepted as full papers; and as far as the experience reports were concerned, the respective number was 15 out of 50 submissions. In addition to these papers, this volume also includes the short research papers, the abstracts of the posters, the position papers of the PhD symposium, and the abstracts of the panel on “Collaboration in an Agile World”.