Depot Dortmund and RRX: How did the collaboration come about?

"How did the collaboration between Siemens and the Rhine-Ruhr Railway Association come about?" Our customer Rhine-Ruhr Public Transport Association talks about the RRX and the Rail Service Center Dortmund-Eving.

Siemens,Collaboration,RRX,transport,mobility,maintenance,depot,dortmund,rail service center,Rhine-Ruhr Public Transport Association,train,rail,service,