Due to the significant proportion of logistics costs in the total transportation cost, and the considerable differences in quotes from various transportation methods, the pricing of square tubes is one of the five crucial factors in selecting a transportation method. However, transportation methods with lower logistics costs often lead to increased costs in other parts of the logistics management system, thus ensuring overall reduced costs is not guaranteed. Therefore, although the pricing of square tubes is a factor affecting management decisions, it is not the sole factor. Companies must consider the quality of logistics transportation and the impact of such services on the overall costs of the logistics system. The level of transportation service typically includes delivery time, reliability, safety, and ease of service.

The shipping time under different transportation methods will affect the inventory level of all goods specified by the logistics management system's main nodes or lead to different levels of impact, i.e., longer shipping times require higher inventory levels. The reliability and safety of the transportation method will also influence the inventory levels at various nodes, the handling of raw material equipment, the application of human capital, damage compensation, and the time and cost of communication.