| Study | Title | Methodology | Findings | Conclusions | Challenges/Risks |
| Špačková (2012) | Risk management of tunnel construction projects | ● Descriptive research design ● Questionnaires and interview schedule ● Tunnel construction projects in Czech Republic | Uncertainties arise from human & organizational factors and unknown geotechnical conditions not identified beforehand | Adopt reliable prediction system which estimate risk factors using a probabilistic model | ● Human factors ● Organizational factors ● Geotechnical conditions |
| Osipova (2008) | Risk management in construction projects: a comparative study of the different procurement options in Sweden | ● Nine construction companies ● Surveys and interviews ● consultants, contractors and project owners | ● No iterative method for risk management ● Risks were high during the program phase | Parties involved in executing projects could cooperate to work together to minimize risks | ● Time ● Quality and ● Cost related risks |
| Odeh & Battaineh (2002) | Causes of construction delay: traditional contracts. | ● Construction project in Jordan ● Survey method | ● Labour efficiency ● Inadequate experience among contractors and consultants ● Owner interference are the leading causes of delay | Project management and interaction between stakeholders result in project delays | ● Labour efficiency ● Incompetent consultants ● External interference |
| Aibinu & Jagboro (2002) | The effects of construction delays on project delivery in Nigerian construction industry | ● 61 construction projects in Nigeria ● Risk assessment and evaluation form | ● Delays had significant implications for project execution in the country | Failing to complete task in time as scheduled occur frequently among contractors | ● Time related risks |
| Ke, Wang & Chan (2012) | Risk management practice in China’s Public-Private Partnership projects | ● Structured interviews with 20 managers in the sector in China ● Comparison using Lyons & Skitmore (2004) questionnaire | ● Inadequate risk management ● High preference for qualitative risk assessment ● Lack of risk management tools | Lack of risk management culture responsible for lack of implementation of risk assessment | Inadequate training and tools for risk assessment and management |