|
| Main classification | Causes under each classification |
|
| (1) Owner | Late issuing the approval documents by the owner |
| Change orders by the owner during construction period |
| Poor communication between the owner and other construction parties |
| Postponement of the project by the owner |
| Progressing payments delay by the owner |
| Delays in decision making by the owner |
| Delay in providing construction materials |
| Poor financial status of the owner |
| Late land handover to the contractor by the owner |
| Undefined scope of working |
|
| (2) Designer | Inappropriate design |
| Late design works |
| Mistake in design |
|
| (3) Contractor | Improper construction method |
| Poor site supervision by the contractor |
| Rework because of errors during construction |
| Ineffective scheduling of the project by the contractor |
| Conflict between the contractor and other parties |
| Difficulties in financing the project by the contractor |
| Poor resource management |
| Poor communication by the contractor with other construction parties |
|
| (4) Consultant | Incapable and Insufficient inspectors |
| Poor communication between the consultant and other construction parties |
| Inflexibility of the consultant |
| Delay of inspection by the consultant |
|
| (5) Labor | Insufficient laborers |
| Personal conflicts among laborers |
| Low skill level of equipment-operator |
| Low productivity of laborers |
| Conflict between laborers and management team |
|
| (6) Environment | Poor terrain condition and wall rock quality |
| Natural disaster |
| Weather condition |
| Poor effect on the drainage system |
| Complicated geological conditions |
|
| (7) Equipment | Lack of equipment efficiency |
| Shortage of advanced large equipment |
| Serious damage to the equipment |
|
| (8) Material | Changes in material types and specifications during construction |
| Shortage in construction material |
| Material loss in the process of transportation |
| Increasing prices of raw materials |
|
| (9) External factors | Award the project to lowest bid price |
| Changing of bankers’ policy for loans |
| Limited construction area |
| Inconvenient site access |
| National policy for subway tunnel construction |
| Lag in technology |
| Disturbance to public activities |
|
