|
| Cause | Rank | Severity index | Related classifications |
|
| National policy for subway tunnel construction | 1 | 75.17 | External |
| Complicated geological conditions | 2 | 74 | Environment |
| Progressing payments delay by the owner | 3 | 72.19 | Owner |
| Award the project to lowest bid price | 4 | 71.61 | External |
| Shortage of advanced large equipment | 5 | 70.3 | Equipment |
| Low productivity of laborers | 6 | 69.43 | Labor |
| Shortage in construction material | 7 | 68.38 | Material |
| Postponement of the project by the owner | 8 | 68.3 | Owner |
| Delay in providing construction materials | 9 | 67.92 | Owner |
| Lack of equipment efficiency | 10 | 67.17 | Equipment |
| Poor terrain condition and wall rock quality | 11 | 66.91 | Environment |
| Limited construction area | 12 | 65.14 | External |
| Lag in technology | 13 | 64.36 | External |
| Delays in decision making by the owner | 14 | 64.16 | Owner |
| Ineffective scheduling of the project by the contractor | 15 | 63.95 | Contractor |
| Insufficient laborers | 16 | 63.65 | Labor |
| Changes in material types and specifications during construction | 17 | 62.58 | Material |
| Low skill level of equipment operator | 18 | 62.47 | Labor |
| Conflict between the contractor and other parties | 19 | 62.05 | Contractor |
| Change orders by the owner during construction period | 20 | 61.54 | owner |
| Difficulties in financing the project by the contractor | 21 | 61.48 | Contractor |
| Serious damage to the equipment | 22 | 61.08 | Equipment |
| Late land handover to the contractor by the owner | 23 | 60.89 | Owner |
| Poor financial status of the owner | 24 | 59.9 | Owner |
| Increasing prices of raw materials | 25 | 57.89 | Material |
| Material loss in the process of transportation | 26 | 57.73 | Material |
| Delay of inspection by the consultant | 27 | 56.14 | Consultant |
| Late design works | 28 | 55.39 | Designer |
| Inflexibility of the consultant | 29 | 55.34 | Consultant |
| Poor communication between the owner and other construction parties | 30 | 53.43 | Owner |
| Poor communication by the contractor with other construction parties | 31 | 53.2 | Contractor |
| Undefined scope of working | 32 | 52.83 | Owner |
| Changing of bankers’ policy for loans | 33 | 51.55 | External |
| Weather condition | 34 | 50.92 | Environment |
| Late issuing the approval documents by the owner | 35 | 50.11 | owner |
| Rework because of errors during construction | 36 | 49.73 | Contractor |
| Inconvenient site access | 37 | 49.68 | External |
| Personal conflicts among laborers | 38 | 48.45 | Labor |
| Mistake in design | 39 | 47.97 | Designer |
| Conflict between laborers and management team | 40 | 47.15 | Labor |
| Improper construction method | 41 | 46.87 | Contractor |
| Poor communication between the consultant and other construction parties | 42 | 45.41 | Consultant |
| Disturbance to public activities | 43 | 45.22 | External |
| Poor site supervision by the contractor | 44 | 44.6 | Contractor |
| Poor resource management | 45 | 43.82 | Contractor |
| Inappropriate design | 46 | 41.93 | Designer |
| Poor effect on the drainage system | 47 | 40.79 | Environment |
| Incapable and insufficient inspectors | 48 | 40.19 | Consultant |
| Natural disaster | 49 | 38.62 | Environment |
|
