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The default Risk Configuration uses your existing Priority field values.
Any values included in the initial configuration displayed are just defaults, 
The values are populated from the Priority Picklist (Sort Order field) and are reversed removing the 0. These values are just default values and can be changed at any time.
Requirement Risk Factors
Many factors may be required to understand the risk for each Requirement. Combining these factors will result in the Requirements Calculated Risk field being updated on each Requirement.
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