In which of the Risk Management processes is the project charter used as an input?

Plan Risk Responses uses the risk register and risk report as primary inputs - the project charter is not an input to this process because responses are developed after risks are identified and analyzed.

Implement Risk Responses uses the risk register, project plan, and lessons learned register as inputs - the project charter is not referenced at this execution-level process.

Plan Risk Management defines how risk management activities will be conducted throughout the project, and it requires the project charter as an input because the charter provides foundational information such as project objectives, high-level risks, summary milestones, and pre-approved financial resources. This information establishes the context for determining risk thresholds, methodology, roles, and the level of risk management rigor appropriate for the project. Without this context, a meaningful risk management plan cannot be developed.

Perform Quantitative Risk Analysis is not a standard PMBOK process name; Perform Quantitative Risk Analysis uses the risk register, risk report, and project schedule as inputs - not the project charter.