Define PMP - Passenger manual proration - in Airlines fares and ticketing?

Commission are taken and distribution agreement between the two parties and compromise

Currently some offices  prohibit this topic

The method of calculating every flight price if we have a long trip and including more than one airline with different classes.

For more information you can check IATA course 

The rules of the Prorate Manual - Passenger (PMP)

A useful tool in maximizing the revenue of an airline , through proper pricing policy and fare structuring between Airline companies which is organized by Multilateral Proration Agreement