1. A control system for controlling a process for making paper or paper pulp having a process product output at an end of the process, comprising: a process variable sensor input configured to receive a process variable related to the process for making paper or pulp paper sensed by a process variable sensor which provides a process variable output; a control element output configured to provide a control signal to a control element which controls the process in response to the control signal; a process model having model product output which is a model representation of the process product output in response to the sensed process variable; a product output setpoint representative of a desired process product output; and a controller configured to compare the product output setpoint to the modeled product output and responsively provide the control signal to the control element.