Port throughput refers to the number of goods that enter and leave the port area via waterways and are loaded and unloaded during the reporting period. This indicator can reflect the size and capacity of the port.
The operation volume refers to the number of goods that complete a complete operation process during loading and unloading operations during the reporting period. A complete operation process refers to: ship, ship barge, ship yard, truck barge, pipe barge, pipeline ship; garage yard. The amount of operations that can be measured by port workers is too small. Under the same conditions of loading and unloading natural tons, the operation volume is large, which means that the port cost is also high. Operation volume can also reflect, to some extent, whether the port production organization is scientific.
The natural tonnage loaded and unloaded refers to the natural tonnage of cargo that entered and left the port area and was loaded and unloaded during the reporting period. One ton of cargo entering and exiting the port, after multiple operations, can be counted as multiple operations but can only be calculated as one natural ton. Therefore, natural tons more effectively reflect the actual work results of the port.