In preparing data and samples for subsequent print, accurate color reproduction has traditionally been among the most complex tasks involved. Subsequently, operators focussed control processes (like proofing) for reproduction on color and its accuracy. With the advent of color management, color accuracy and color reproducibility through the process have undergone significant improvement. With that - at least potentially - the focus of proofing can undergo changes again from highlighting color reproducibility to system simulation.As color management, low-end color devices, and digital networking tools become more available, questions like the following arise:1. Which devices are able to proof which other devices' behavior?2. Is color the only characteristic for which simulation is required and why is simulation required?3. If more than color simulation is required, what hierarchy of importance can be assumed for the other attributes to be simulated for each combination of device and media?The paper under view deals with these and other involved questions and attempts to address relevant topics with respect to system simulation.