Flexibility, scalability and openness are the three traits combined with security in this most powerful SCADA solution on the planet. It can be deployed with equal ease on a single system with a very light form factor to a large geographically distributed system with up-to 2048 servers (yes, if you are reading binary, it is indeed 2 to the power of 11).
More details can be found at this link SCADA System SIMATIC WinCC Open Architecture.
