Interest in agile development continues to grow: the number of practitioners adopting such methodologies is increasing as well as the number of researchers investigating the effectiveness of the different practices and proposing improvements. The XP c- ference series has actively participated in these processes and supported the evolution of Agile, promoting the conference as a place where practitioners and researchers meet to exchange ideas, experiences, and build connections. XP 2010 continued in the tradition of this conference series and provided an int- esting and varied program. As usual, we had a number of different kinds of activities in the conference program including: research papers, experience reports, tutorials, workshops, panels, lightning talks, and posters. These proceedings contain full - search papers, short research papers, and experience reports. Moreover, we have also included in these proceedings the abstracts of the posters, the position papers of the PhD symposium, and the abstract of the panel. This year we had two different program committees for evaluating research papers and experience reports. Each committee included experts in the specific area. This approach allowed us to better evaluate the quality of the papers and provide better suggestions to the authors to improve the quality of their contributions.

Inhalt
Research Papers.- Extending Refactoring Guidelines to Perform Client and Test Code Adaptation.- Security Testing in Agile Web Application Development - A Case Study Using the EAST Methodology.- Adoption of Team Estimation in a Specialist Organizational Environment.- Extreme Product Line Engineering Refactoring for Variability: A Test-Driven Approach.- Introducing Agile Methods in a Large Software Development Team: The Impact on the Code.- Agile Undercover: When Customers Don't Collaborate.- Exploring Defect Data, Quality and Engagement during Agile Transformation at a Large Multisite Organization.- Auto-tagging Emails with User Stories Using Project Context.- Towards Understanding Communication Structure in Pair Programming.- Continuous Selective Testing.- Applying SCRUM in an OSS Development Process: An Empirical Evaluation.- Short Research Papers.- An Automated Approach for Acceptance Web Test Case Modeling and Executing.- Communication in Context: A Stimulus-Response Account of Agile Team Interactions.- Understanding the Importance of Trust in Distributed Agile Projects: A Practical Perspective.- Values and Assumptions Shaping Agile Development and User Experience Design in Practice.- Introducing Agile Methods in a Large Software Development Team: The Developers Changing Perspective.- A Systematic and Lightweight Method to Identify Dependencies between User Stories.- Agile Documents: Toward Successful Creation of Effective Documentation.- Structuring Complexity Issues for Efficient Realization of Agile Business Requirements in Distributed Environments.- A Literature Review on Story Test Driven Development.- Improving Responsiveness, Bug Detection, and Delays in a Bureaucratic Setting: A Longitudinal Empirical IID Adoption Case Study.- Dealing with Navigationand Interaction Requirements Changes in a TDD-Based Web Engineering Approach.- Adoption of Software Engineering Process Innovations: The Case of Agile Software Development Methodologies.- A Quantitative Comparison of Test-First and Test-Last Code in an Industrial Project.- Product and Release Planning Practices for Extreme Programming.- Experience Reports.- Launchpad's Quest for a Better and Agile User Interface.- Distributed Meetings in Distributed Teams.- Transitioning a Large Organisation: Adopting TDD.- What Agile Teams Can Learn from Sports Coaching.- Prototypes Are Forever Evolving from a Prototype Project to a Full-Featured System.- Put It to the Test: Using Lightweight Experiments to Improve Team Processes.- Kanban at an Insurance Company (Are You Sure?).- Automated Acceptance Testing of High Capacity Network Gateway.- So You Think You're Agile?.- From a Timebox Tangle to a More Flexible Flow.- Stakeholder Engagement in the Evolutionary Design of an API.- From Chaos to Kanban, via Scrum.- Tech Challenges in a Large-Scale Agile Project.- Energy Project Story: From Waterfall to Distributed Agile.- Design and Development in the Agile Room: Trialing Scrum at a Digital Agency.- Posters.- Reinforcing the Learning of Agile Practices Using Coding Dojos.- AnnoTestWeb/Run: Annotations Based Acceptance Testing.- Open Source and Agile Methods: Two Worlds Closer than It Seems.- A Technique to Classify and Compare Agile Methods.- What Language Does Agile Speak?.- Combining Open Space Technology (OST) with XP through Scenarios for Enhanced Requirements Elicitation.- Balancing Scrum Project Management Process.- TDD Effects: Are We Measuring the Right Things?.- Pair Programming: The Choice of a Partner.- Agile Adoption Strategies in the Context of Agile in the Large:FLEXI Agile Adoption Industrial Inventory.- Educating 'RITA' with XP.- Ph.D. Symposium.- A Multiple Case Study of Teamwork in Norwegian Software Development Organizations.- A Systematic Approach for Selection and Adoption of Agile Practices in Component-Based Projects.- Software Development: A Stakeholder Approach.- A Framework for Situated Evaluation of Methodology Usage in Agile Environments.- Panel.- Collaboration in an Agile World.