Modeling Assumptions Regarding Pooling of Locomotives
Units that come off inbound trains are serviced and then become part of a power pool.
Outbound trains take units from the power pool as needed without regard to inbound trains.
In cases of shortages of units, additional power must be sent to the terminal or certain trains must be under-powered, delayed, or cancelled.
In cases of surpluses of units, fleet managers must decide whether units should be sent to terminals where they can be used more effectively.