Process Engineers are heavy users of simulation tools (HYSYS, UniSim, A+, ...) to design new processes or revamps. They mainly work in steady-state mode, but frequently they have to interact with the Control Engineers to discuss how the process will be controlled and operated.

With current dynamic process simulators, it is possible to create a reliable representation of an operating plant on a PC - including all process equipment, all instrumentation and controllers and having it running several times faster than in real time.