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...

Software engineering is a rapidly growing and changing field. Over the last dec ade, it has gained significant popularity, and it is now heralded as a discipline of its own. This edited collection presents recent advances in software engineering in the areas of evolution, comprehension, and evaluation. The theme of the book addresses the increasing need to understand and assess software systems in order to measure their quality, maintain them, adapt them to changing requirements and technology, and migrate them to new platforms. This need can be satisfied by studying how software systems are...