How the Techniker Krankenkasse got rid of its host

Many of the companies that have been running electronic data processing for several decades still use their legacy applications on mainframes (hosts). Some have tried to move away from these platforms, few have succeeded. Techniker Krankenkasse is one of the companies that have succeeded. 

How did the TK manage it? What were the initial requirements, what were the success factors? What role did TK's own framework "TK easy" play? We welcome Dr. Frank Griffel from TK's IT department as our guest, who will answer these questions and many more.