There are five inputs to the quantitative risk analysis process. Which one of the following is NOT an input to the perform quantitative risk analysis process?

The risk register is a valid input because it contains identified risks, their qualitative ratings, and root causes that feed directly into numerical analysis.

The risk management plan is a valid input because it defines the roles, budget, timing, and risk thresholds applied during quantitative analysis.

The cost management plan is a valid input because it governs how cost contingency reserves are structured and measured, which is directly used in quantitative modeling.

The PMBOK Guide specifies exactly five inputs for Perform Quantitative Risk Analysis: risk register, risk management plan, cost management plan, schedule management plan, and organizational process assets. Enterprise environmental factors appear as inputs in many other project management processes but are not included in this specific process's input list.