1. In an imaging device, a method of determining one or more operating parameters for processing a media sheet by a processing device in the imaging device, the method comprising: storing in memory of the imaging device a predetermined set of OPD equations incorporating a predetermined set of N variables related to the media sheet and the processing thereof by the processing device of the imaging device wherein each OPD equation corresponds to one operating parameter of the one or more operating parameters; providing an operational sensor set having a plurality of sensors for the imaging device for measuring a value of each variable in the set of N variables, the operational sensor set in operative communication with a controller for providing corresponding output signals representative of the measured values for the set of N variables; converting the received output signals into the N measured variable values; solving the set of OPD equations using the received N measured variable values to determine the one or more operating parameters; and, processing the media sheet with the processing device using the determined one or more operating parameters.