In each project even if same was done 100 times there are some risk involved. It might be as simple as resource not available at critical time or it might be a thunder storm. Not all risk are negative, there are positive risk as well those we called as Opportunity. So Risk management is all about reducing threat and enhancing opportunity. And monitoring project risk to apply risk response as and when they require.
There are 6 processes.
1 Plan Risk Management
2 Identify Risks
3 Perform Qualitative Risk Analysis.
4 Perform Quantitative Risk Analysis
5 Plan Risk Responses.
6 Control Risks