Rebecca Wirfs-Brock is the president of Wirfs-Brock Associates and an object design pioneer who invented the set of design practices known as responsibility-driven design (RDD)—and by accident started the x-driven design meme. Along the way, she authored two popular object-design books that are still in print and was the design columnist for IEEE Software. You can find her design columns, papers, and writing on her website. In her work, Rebecca helps teams hone their design and architecture skills, manage and reduce technical debt, refactor their code, and address architecture risks. She’s the program director of the Agile Alliance’s Experience Report Initiative and furthers her interest in software patterns by serving on the board of the Hillside Group and writing essays about the relationship between patterns and heuristics, patterns about how to create and manage magic backlogs, sustainable architecture, agile QA, and adaptive systems architectures.