Electromagnetic flow control is a well-proven technology for improving quality in continuous slab casting. Electromagnetic stirring, based on the principle of travelling magnetic fields, has been shown as particularly efficient for flow acceleration, temperature homogenization and inclusion washing in surface/subsurface regions of the strand. Different configurations of static magnetic fields have also been utilized to brake and stabilize high speed processes. For varying casting conditions such as throughput, slab format, slag type, steel grade, argon flow injection, SEN type and immersion depth mold level and so on, different settings are needed to create the best possible flow conditions. The most appropriate settings can be found through casting trials where an experience database can slowly be built up, or by numerically simulating the process with modern computer technology and software. Both methods, however, are very time-consuming.