An apparatus is provided for diagnosing the state of health of a vehicle and
for
providing the operator of the vehicle with a substantially real-time indication
of the efficiency of the vehicle in performing an assigned task with respect to
a predetermined goal. A processor on-board the vehicle monitors sensors that provide
information regarding the state of health of the vehicle and the amount of work
the vehicle has done. In response to anomalies in the data from the sensors, the
processor records information that describes events leading up to the occurrence
of the anomaly for later analysis that can be used to diagnose the cause of the
anomaly. The sensors are also used to prompt the operator of the vehicle to operate
the vehicle at optimum efficiency.