| Manifestations | Cost increase reason |
| Institutional cost | Unreasonable corporate structure and imperfect system |
| Mechanism cost | The reward and punishment system is unreasonable, the incentive system is imperfect, and supporting measures are not implemented. |
| Staff quality cost | Poor quality of management personnel and construction personnel |
| Quality cost | Increase the cost of quality |
| Duration of construction | Project delay due to contractor reasons |
| Safety cost | Protection of people, materials, and equipment |