An intelligent on-board monitoring system for replaceable module for a printing apparatus includes a memory element, an input for receiving information either from sensors on the replaceable module, or from the printing apparatus concerning printing operations performed, and a microprocessor connected to the memory for performing calculations upon data stored in the memory and upon the input information. The calculations produce results related to the performance of the replaceable module. These results can either be communicated to the printing apparatus, or used to control an adjustable operating parameter of the replaceable module itself, all without requiring computational resources of the printing apparatus itself.