Daud Alam, graduate economist, born in Herat, Afghanistan, in 1955, began his career as a programmer for a Siemens subsidiary. The second professional stage was the software house Wesser-Informatik in Oberaichen. He then worked for the Project Management Academy in Stuttgart as a project manager. Most recently, he worked for Daimler AG for almost 20 years. He is currently commissioned as an IT expert by Daimler AG and also conducts seminars in Germany and abroad for AKKA Technologies SE and the Daimler Bildungsakademie. He taught the first edition of the book for five semesters at the Albstadt-Sigmaringen University of Applied Sciences. He lectures for Daimler AG students at the Baden-Württemberg Cooperative State University and is a lecturer at Pforzheim University.Uwe Gühl, Dr.-Ing. Dipl. Inform., born 1966 from Offenbach/Main, Germany, works as a freelancer in the fields of IT project management of international on/off-shore projects, ITquality and software test management as well as moderation and international team development. After an apprenticeship and work in social security, he studied computer science and earned a doctorate in mechanical engineering. He researched and worked in companies in the automotive, banking, retail, logistics and media industries as well as at universities both in Germany and internationally in Switzerland, France, U.S.A., India and Thailand.