“…During the second half of the 20th century, increasing importance of Information Technology (IT) for business processes required a process-and service-oriented IT service-delivery [10], Therefore different approaches for effective and efficient IT provisioning have been developed. Some of them are established as best practices [11]. ITSM thus stands for a process to plan and to control the quality and quantity of provided IT services considering the objectives of business processes, customer orientation and cost optimization [10] and can be defined as "[…] a set of specialized organizational capabilities for providing value to customers in the form of services" [12].…”