Advantages of unit loads:
More items can be handled at the same time, thereby reducing the number of trips required and, potentially, reducing handling costs, loading and unloading times, and product damage.
Enables the use of standardized material handling equipment.
Disadvantages of unit loads:
Time spent forming and breaking down the unit load.
Cost of containers/pallets and other load restraining materials used in the unit load
Empty containers/pallets may need to be returned to their point of origin.