Without the first edition of this book, there would not be a second edition, and so we are pleased to continue to acknowledge the people who helped with the earlier version. Coauthors of chapters were Gregory Abowd, Lisa Brownsword, Jeromy Carrière, Linda Northrop, Patricia Oberndorf, Mary Shaw, Rob Veltre, Kurt Wallnau, Nelson Weiderman, and Amy Moormann Zaremski. The many people at the Software Engineering Institute who helped to make the first edition happen through their support and encouragement include Linda Northrop, Sholom Cohen, Lisa Lane, Bill Pollak, Barbara Tomchik, and Barbara White.

We owe a debt of gratitude to our many reviewers, including Felix Bachmann, John Bennett, Sonia Bot, Lisa Brownsword, Bob Ellison, Larry Howard, Richard Juren, Philippe Kruchten, Chung-Horng Lung, Joaquin Miller, Linda Northrop, David Notkin, Patricia Oberndorf, Jan Pachl, Lui Sha, Nelson Weiderman, Amy Moormann Zaremski, and several anonymous Addison-Wesley reviewers. Commander Rob Madson of the U.S. Navy provided partial support for the development of graphics. Peter Gordon of Addison-Wesley kept us grounded in reality.

For this second edition, we owe many thanks to the chapter co-authors: Linda Northrop, Felix Bachmann, Mark Klein, Bill Wood, David Garlan, James Ivers, Reed Little, Robert Nord, Judith Stafford, Jeromy Carrière, Liam O'Brien, Chris Verhoef, Jai Asundi, Hong-Mei Chen, Lisa Brownsword, Anna Liu, Tanya Bass, James Beck, Kelly Dolan, Cuiwei Li, Andreas Löhr, Richard Martin, William Ross, Tobias Weishäupl, Gregory Zelesnik, Robert Seacord, and Matthew Bass. As always, our reviewers deserve much credit for helping us make this book better. We thank Alexander Ran, Paulo Merson, Matt Bass, Tony Lattanze, Liam O'Brien, and Robert Nord.

Many people contributed to the body of work related to the characterization and achievement of software quality attributes. We are indebted to John McGregor, Bob Ellison, Andy Moore, Scott Hissam, Chuck Weinstock, Mario Barbacci, Heather Oppenheimer, Felix Bachmann, Stefen Kowalewski, and Marko Auerswald.

Special thanks to Mike Moore of NASA's Goddard Space Flight Center for providing the ECS system that was the subject of the CBAM case study in Chapter 12.

At the SEI, we are indebted to Linda Northrop for her management, commitment, and contributions to this work; to Bob Fantazier for steadfastly producing the book's graphics; to Sheila Rosenthal for her research assistance; and to Laura Novacic, Carolyn Kernan, and Barbara Tomchik for their support.

At Addison-Wesley, Peter Gordon continues to be the taskmaster with the velvet whip. We thank him and all of the people involved in this book's production.

Len Bass did some of the production work on this book while visiting at the Commonwealth Scientific Industrial Research Organization in Australia. He would like to thank them for their support.

And finally, we would like to thank the special people in our lives for their endurance and encouragement throughout this process.