--- sourceDocument: Australia IT Service Management sourceDocumentLink: https://www.servicenow.com/docs/r/australia/it-service-management Release : - australia ft:locale : - en-US ft:publication_title : - Australia IT Service Management ft:clusterId : - itsm bundleId : - itsm workflow : - Technology --- # Calculated Risk Score # Calculated Risk Score {#ariaid-title1} Release version: Australia Updated September 10, 2026 ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 2 minutes to read Summarize ![AI sparkle icon](https://servicenow.com/docs/portal-asset/ai-sparkle-icon) Summarized using AI This content was generated using new OpenAI-powered functionality. Results are provided on an as is basis and are not guaranteed to be accurate or complete. ## Summary of Calculated Risk Score The Calculated Risk Score feature in ServiceNow enables you to determine the risk value of a change request based on the success probability and impact values. This calculation relies on thesnchgprobabilityrisklookuptable, which maps success probability bands and impact levels to corresponding risk values. The feature is activated as part of the Change Management - Risk Calculator, and both the lookup table and menu item become available only after activation. Show full answer Show less ## Key Features * **Risk Lookup Table:** The **snchgprobabilityrisklookup** table contains default mappings of impact and success probability bands (High, Medium, Low) to risk values. It uses banded success probability values rather than raw percentages. * **Success Probability Bands:** These bands are derived from success probability definitions, which define the probability ranges that produce each band. * **Manage Records:** You can add or delete records in the risk lookup table. A business rule ensures no duplicate impact-probability combinations exist. * **Risk Calculation Engines:** Multiple risk engines calculate risk values, and the system selects the highest risk to assign to the change request. * **Risk Types:** There are three calculated risk score types: * Impact + Success Probability * Impact + Change Success Score * Impact + Change Model Success Additionally, a status of "Not set" indicates risk has not been evaluated. * **Access and Visibility:** Users with read access to change requests can view risk scores and the success probability definitions via the related links on the change request form. * **Domain Separation Support:** The lookup table supports domain separation and is process-separated when the domain separation plugin is installed. ## Practical Application for ServiceNow Customers By leveraging the Calculated Risk Score feature, you can automate and standardize risk assessment for change requests based on defined impact and success probability criteria. This helps ensure consistent risk evaluation, supports better decision-making in change management, and allows customization of risk values to fit your organizational needs. Activating the feature and managing the lookup table records properly enables precise control over how risk is calculated and presented within your ServiceNow environment. Risk lookup table is to get the risk value corresponding to the success probability value and impact value. sn_chg_probability_risk_lookup table is used to fetch the data to calculate the risk value of the change request. Note: The `sn_chg_probability_risk_lookup` table and the Calculated Risk Score menu item are available only after the change risk calculator feature is activated. If you don't see the table or the menu, activate the feature first. For more information, see [Activate Change Management - Risk Calculator](https://www.servicenow.com/docs/FjXys7u5~cWh9gElhX2Q6A "The Change Management - Risk Calculator plugin (com.snc.bestpractice.change_risk) is active by default in the base system. This plugin includes demo data and activates related plugins if they are not already active."). ## Defining probability ranges {#risk-lookup__section_probability-ranges} The Calculated Risk Score lookup does not define probability ranges. It consumes a success probability band that is calculated from the success probability definitions that produce each band. For more information, see [Success Probability definitions](https://www.servicenow.com/docs/rcGiJNeytqBBItmTKMATaw "Success Probability definition is a configuration that defines the probability and the matching conditions of a change request."). Also see [Success score calculation](https://www.servicenow.com/docs/r0FU94XwvdGHVxykHSWjUQ "To calculate the success score, formula indicators are provided. These indicators apply the multiplication operation to the data collected by the automated indicators to arrive at the final score.")on how the resulting band combines with impact to produce the risk value. By default, there are nine records with all the possible mappings for Impact and Success Probability along with their corresponding risk values. The lookup maps banded success Probability values - High, Medium, and Low - against Impact values rather than raw percentages. The probability ranges that determine these bands are configured in the success probability definitions. For more information, see [Success Probability definitions](https://www.servicenow.com/docs/rcGiJNeytqBBItmTKMATaw "Success Probability definition is a configuration that defines the probability and the matching conditions of a change request."). ## Managing risk lookup records {#risk-lookup__section_risk-lookup-management} You can add and delete records in the table. The Check impact and probability combination business rule validates duplicate mapping entries. Navigate to AllChangeAdministrationCalculated Risk Score. All risk calculating engines calculate their corresponding risk value. The system picks the highest risk and defines the risk for the change. You can modify the risk values irrespective of the values defined for Impact and success probability. You can view the success probability definition that set the success probability on the change request by accessing the sn_chg_probability_details table. Users with read access to change requests can access this table. On the change request form, in the Related Links section, select Calculate risk. The risk engines calculate the risk for the change. Select the icon next to the Risk field to view the risk set for the change. Select the icon next to Calculated Risk Score to find which type of success probability definition sets the risk for the change. There are three types of calculated risk score: * Calculated (Impact + Success Probability) * Calculated (Impact + Change Success Score) * Calculated (Impact + Change Model Success) * Not set: When the risk is not evaluated {#risk-lookup__ul_fxz_ynt_h5b} Note: Risk lookup supports domain separation. The sn_chg_probability_risk_lookup table is process separated when you install the domain separation plugin. *[\>]: and then