1. Siemens Corporate Technologies, Vienna, Austria. E-mails: Marta.Sabou@siemens.com, Alfred.Einfalt@siemens.com, Lukas.Krammer@siemens.com
2. Christian Doppler Laboratory for Security and Quality Improvement in the Production System Lifecycle
3. Faculty of Informatics, Technische Universität Wien, Vienna, Austria. E-mails: Stefan.Biffl@tuwien.ac.at, Wolfgang.Kastner@tuwien.ac.at, Fajar.Ekaputra@tuwien.ac.at