empirical research has become an integral part of software engineering research and practice. This unique text / reference includes chapters from several international research on empirical software engineering and focuses on practical knowledge needed to conduct, reporting and using empirical methods in software engineering. Part 1,? Research Methods and Techniques?, Researching the proper use of various strategies for collecting and analyzing data, and using the strategies most appropriate. It offers information on various techniques, methods, and issues of qualitative and quantitative, provides a toolkit for readers who apply across the diversity of software development context ? ensure the relevance of empirical software engineering, and shows the practical effect ? Needs detailed information on topics (such as surveys) that often contain methodological errors This guide, extensive practical start would prove valuable and useful reference for practicing software engineers and researchers. Also, be suitable for graduate students studying empirical methods in software development. Dr. He has conducted empirical research in software engineering for 12 years. Dag Sj? G is currently research director of software engineering group of Simula Research Laboratory, Norway, which ranks No.