The book "IT Quality Management" provides a comprehensive overview of the entire IT quality management process. It addresses all relevant aspects, from requirements management to change management, as well as defect and migration management, acceptance testing, and final data cleansing. Drawing on nearly twenty years of experience in testing, acceptance, and certification of medium to large IT systems, including complex software for administrations and industries in various countries, the work offers valuable insights. Instead of introducing new or consolidated methods, the book focuses on practical approaches that take into account the different organizational levels within companies. This allows for a realistic application of the methods, providing support as needed.