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Add or modify risk and impact conditions

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Add or modify risk and impact conditions

You can define risk calculation rules on which the risk and impact of a change are calculated. Best Practice - Change Risk Calculator is activated by default in the base system.

Before you begin

Role required: itil_admin or admin

About this task

A risk calculation rule is defined with two elements.
  • Conditions that can evaluate to true or false. You can use a condition builder or write a script.
  • Risk and Impact field value settings when the conditions evaluate to true.


  1. Navigate to Change > Administration > Risk Conditions.
  2. Click New, or click the risk condition to modify.
    You can also edit risk conditions from within the Change Request form by opening the form context menu and clicking Edit Risk Conditions.
  3. Complete or update the form, as appropriate.
    Field Description
    Name Enter a descriptive name for the rule


    Select a value for one of these fields. The selection determines which field to update based on this risk calculation.
    Active Select the check box to use the rule.
    Order Enter the order in which this risk calculation is evaluated. Rules with lower numbers are evaluated first. If there are two or more rules with differing orders, the rule with the lowest order is evaluated and the others are ignored.
    Use advanced condition Select the check box to enter a script instead of using the condition builder.
    Use script values Select the check box to hide the Risk and Impact fields. The script specifies the risk and impact values.
    Description Enter a description of how this risk calculation is applied.
  4. Specify the rule based on your selected rule method.
    Condition Use the condition builder to add conditions. It is hidden if you selected Use advanced condition.
    Use advanced conditions Write the script in the Advanced condition field using standard business rule syntax. The condition must set the global variable answer to true or false.
    Use script values Write the script in the Script values field. Specify the Risk and Impact values in the script.

    The conditions are set using either the condition builder or an advanced condition script.

    In the following example, the Advanced condition script first determines whether the CI is a business service. If so, the script identifies whether the Business criticality value is 1 - most critical or 2 - somewhat critical. If it does, it sets the global variable answer to true.
    Critical business service risk condition

    When the Advanced condition script returns true, the script in the Script values field sets the change request Impact and Risk values based on the Business criticality value.