The major principle of handling operations is the principle of minimum operating capacity. That is, when the goods move, try to reduce the "secondary handling" and "temporary parking", so that the number of handling is as small as possible. In order to improve transportation efficiency, the operator certainly wants to reduce the transfer operation as much as possible. However, there are many reloading operations on the way to accidents during transportation. For example, when working on a railway, the transportation on the line is completed once, but the work before and after it is at least 6 to 8 times. If the goods on the pallet are transferred to other pallets each time the 6 to 8 reloading operations are carried out, the whole loading and unloading operation is heavy, which will lose the effect of pallet transportation. On the other hand, if the goods are loaded on the tray at the origin, no matter how complicated the goods are stored and transported on the way, the original condition of the goods on the pallet will not be changed, and the end point will be able to fully exert the effect of pallet transportation. Not only in the railway area, in the aspect of automobile transportation and ship transportation, but also the direct transportation of pallets, or the combination of various modes of transportation to form a direct direct transportation, the transportation industry and the materials units that use transportation can get good transportation economic effects.
Therefore, the direct transportation and use of pallets is one of the indispensable ways to develop modern logistics.
However, in China, the actual situation is that most manufacturers have not been able to achieve direct transport of pallets, and the waste of manpower and material resources caused by this is very alarming. According to the investigation of the Pallet Professional Committee of the China Federation of Logistics and Purchasing, among the reasons for the inability to achieve direct pallet transportation, enterprises have the most management difficulties in selecting pallet turnover and return. Most enterprises use the pallet as a turnaround tool inside the enterprise, and the tray rarely leaves the enterprise, thus greatly reducing the use of the tray.