1. An operating ability monitoring system comprising: a person-dependent acceleration sensor configured to couple with a machine operator; a telemetry unit coupled with said person-dependent acceleration sensor; a second sensor coupled with a vehicle or moving machine operated by said machine operator; an evaluation unit configured to receive acceleration values from the person-dependent acceleration sensor and, receive movement values from the second sensor coupled with said vehicle or said moving machine which represent acceleration of said vehicle or said moving machine and, compare the acceleration values from the person-dependent acceleration sensor to the acceleration values from the second sensor coupled with the vehicle or the moving machine and, derive a classification of a current operating ability state based on said compare; a machine monitoring system; wherein the evaluation unit is further configured to make a result of the classification of the current operating ability state available to the machine monitoring system; wherein the evaluation unit is further configured to trigger a response test in the event that the current operating ability state is classified as impaired, wherein the evaluation unit is further configured, depending on the response test, to confirm or repeal the classification of the current operating ability state; and wherein said response test is a plausibility check enabling said driver to respond to said response test within a defined period to detect a reduction in the driving ability such that if a response from the driver does not take place, the machine monitoring system assumes driving inability and initiates a corresponding response of intervening in a course of travel associated with the driver.