Long-Term Average 
Long-Term Average
Definition
Rating for the average concentration measured for an agent to which a person is exposed over a longer period of time.
In the SAP application component Occupational Health you assign long-term average ratings to each agent in an object type. In the system, the entry for the long-term average is directly related to the
short-time exposure limit for the agent to which a person is exposed.
A person is constantly exposed to noise at the workplace on the shop floor due to running machinery. The noise level measured exceeds the specified reference values by more than 50%. Therefore, the long-term average rating for noise exposure is B.