In recent years, IT has come to play an important role in companies. So successful execution of business processes often depends on mission-critical IT-solutions. Managing such IT is challenging. Companies have to keep up with rapid developments, but also consider long-term consequences while doing so. How do they survive in the long run without surrendering in the short run? What should be done in-house? What should be bought from external providers? How should they allocate scarce IT resources?