This book contains the refereed proceedings of the 15th International Conference on Agile Software Development, XP 2014, held in Rome, Italy, in May 2014. Because of the wide application of agile approaches in industry, the need for collaboration between academics and practitioners has increased in order to develop the body of knowledge available to support managers, system engineers, and software engineers in their managerial/economic and architectural/project/technical decisions. Year after year, the XP conference has facilitated such improvements and provided evidence on the advantages of agile methodologies by examining the latest theories, practical applications, and implications of agile and lean methods. The 15 full papers, seven short papers, and four experience reports accepted for XP 2014 were selected from 59 submissions and are organized in sections on: agile development, agile challenges and contracting, lessons learned and agile maturity, how to evolve software engineering teaching, methods and metrics, and lean development.

The field of software engineering is characterized by speed and turbulence in many regards. While new ideas are proposed almost on a yearly basis, very few of them live for a decade or a longer. Lightweight software development methods were a new idea in the latter part of the 1990s. Now, ten years later, they are better known as agile software development methods, and an active community driven by practitioners has formed around the new way of thinking. Agile software development is currently being embraced by the research community as well. As a sign of increased research activity, most research-oriented conferences have an agile software development track included in the conference program. The XP conference series established in 2000 was the first conference dedicated to agile processes in software engineering. The idea of the conference is to offer a unique setting for advancing the state of the art in research and practice of agile processes. This year's conference was the tenth consecutive edition of this international event. Due to the diverse nature of different activities during the conference, XP is claimed to be more of an experience rather then a regular conference. It offers several different ways to interact and strives to create a truly collaborative environment where new ideas and exciting findings can be presented and shared. This is clearly visible from this year's program as well.

This book constitutes the refereed proceedings of the 7th International Conference on Extreme Programming and Agile Processes in Software Engineering, XP 2006, held in Oulu, Finland, June 2006. The book presents 16 revised full papers together with 6 experience papers, 12 poster papers and panel summaries, organized in topical sections on foundation and rationale for agile methods, effects of pair programming, quality in agile software development, and more.

Extreme Programming has come a long way since its ?rst use in the C3 project almost 10 years ago. Agile methods have found their way into the mainstream, and at the end of last year we saw the second edition of Kent Beck s book on Extreme Programming, containing a major refactoring of XP. This year, the 6th International Conference on Extreme Programming and Agile Processes in Software Engineering took place June 18 23 in She?eld. As in the yearsbefore, XP 2005provideda unique forum for industry and academic professionals to discuss their needs and ideas on Extreme Programming and - ile methodologies. These proceedings re?ect the activities during the conference which ranged from presentation of research papers, invited talks, posters and demonstrations, panels and activity sessions, to tutorials and workshops. - cluded are also papers from the Ph.D. and Master s Symposium which provided a forum for young researchers to present their results and to get feedback. Asvariedastheactivities werethe topicsofthe conferencewhichcoveredthe presentationofnewandimprovedpractices, empiricalstudies, experiencereports and case studies, and last but not least the social aspects of agile methods. The papers and the activities went through a rigorous reviewing process. Each paper was reviewed by at least three Program Committee members and wasdiscussedcarefullyamongtheProgramCommittee.Of62paperssubmitted, only 22 were accepted as full papers."

This book constitutes the refereed proceedings of the 4th International Conference on Extreme Programming and Agile Processes in Software Engineering, XP 2003, held in Genova, Italy in May 2003. The 33 revised full papers presented together with experience reports, research reports, abstracts from an educational symposium and a PhD symposium, as well as panel statements were carefully reviewed and selected for inclusion in the book. The papers are organized in topical sections on managing agile processes, methodological issues, extending agile methodologies and XP, methods and tools, teaching and education aspects, testing, pair programming, and other XP practices.