Physical distribution (PD) is the combination of those activities related to the effective storage, handling, delivery and possible return of end items (mainly finished goods and service parts), at the right time, from a manufacturer to their correct marketplace (the consumer). PD activities must ensure the correct choice of operations of inter-modal haulage, as well as warehousing, material handling, control of inventory, administration of orders, distribution site analysis, packaging, business system entries, and those infrastructures needed for effective management