Software quality and software testing have for decades been decisive topics in software development. However their potential and their influence on the economical side of software development and operations has been understood more clearly only in the last years. This is illustrated by the increasing number of books such as this one and conferences such as SQM(Software Quality Management Congress) and ICSTEST (In ternational Conference on Software Testing). The era of the commercial Internet has brought about new requirements and new challenges for software quality and testing experts. They...