The analysis of capital investment and operating costs of water-sealed caverns of different volumes shows that underground caverns offer greater advantages over ground steel tank farm in respect of safety , environmental protection, capital investment and operating cost.

In this article we tested the effect of ERP implementation on the principle business cost and operating cost of the listed manufacturing companies in China, and found no evidence to support the argue that ERP implementation can reduce the cost of enterprise.

Urban rail transit is at a stage of rapid development in our country at the present time, but there has been a lack of coordination in the process of development, especially construction cost and operating cost of rail transit are so high that they have seriously affected the healthy development of rail transit.