For software developers testing their own code or designs; indepdendent testers testing someone else's code; and testers or developers testing bug fixes and other maintenance changes. This reference presents, in detail, an effective, step-by-step, cost- effective approach to software testing that is based on common practice--with improvements inspired by academic testing research and practial experience. The approach is designed to be gradually adoptable, so that it does not disrupt current work, and it scales down gracefully under schedule pressure. Outlines a systematic process/strategy of software testing that incorporates test design, test implementation, and measurements of test quality. Explains solid testing techniques in detail and shows how to apply them to testing tasks. Answers such questions as: How do I design tests? What are common tester errors, and how do I avoid them? How do I implement tests? How do I know how good my tests are? How do I know when I've tested enough? Features unique coverge of testing bug fixes and other changes.