At the same time, the need to evaluate and to obtain evidence of a different, process methods and tools have been emphasized. Lech Madeyski offers the first in-depth evaluation of agile methods. He presents in detail the results of three different experiments, including practical examples on how to conduct statistical analysis or meta-analysis SPSS package, using as an evaluation indicator of acceptance tests passed (overall and per hour) and design complexity metrics. This book is suitable for graduate students, researchers and advanced professionals in software engineering.