This documentation supports the 9.1.04 version and its patches of BMC Atrium Core. The documentation for version 9.1 to 9.1 Service Pack 3 and its patches is available here.

To view the latest version, select the version from the Product version menu.

Creating an impact rule

BMC CMDB provides out-of-the-box impact rules that the Normalization Engine uses to populate the HasImpact and ImpactDirection attributes for relationships in all data sets. In addition to these rules, you can also create rules for populating the ImpactWeight and ImpactPropagationModel attributes for relationships based on your requirements.

For more information about out-of-the-box impact rules, see Normalization and service impact.

Best Practice

We recommend that you not edit or delete the out-of-the-box impact rules that are shipped with the product. Other BMC products that consume the configuration data in BMC CMDB reference the out-of-the-box impact rules. Editing or deleting these rules can result in errors in these products.

To create an impact rule 

  1. On the BMC CMDB Dashboard, click Configurations.
  2. From the list, select Manage Normalization Rules > Features.
  3. Click the Impact tab.


  4. To create a new Impact Rule, click  icon.
    The following page is displayed.


      5. In the Create Impact Rule page, configure the following parameters.

ParametersDescription
Rule Name

Enter a unique, descriptive name for the rule.

ActiveClick to activate the rule so that the Normalization Engine can apply the rule on data sets for which the Auto Impact feature is enabled.
Class NameSelect the relationship class for which you want to create an impact rule.
(Optional) Apply To SubclassSelect this check box if you want to apply the rule to all subclasses of the selected class name.
Qualifier

Enter the qualification rule, or to build the qualification rule using the Qualification Builder, click . For information about using the Qualification Builder, see Using the Qualification Builder.

Source Class Name

Select the parent class in the relationship.

(Optional) Apply To SubclassSelect this check box if you want to apply the rule to all subclasses of the source class.
Source Qualifier

Enter the source class qualification rule, or to build the qualification rule using the Qualification Builder, click . For information about using the Qualification Builder, see Using the Qualification Builder.

Destination Class Name

Select the child class in the relationship.

(Optional) Apply To SubclassSelect this check box if you want to apply the rule to all subclasses of the destination class.
Destination Qualifier

Enter the destination class qualification rule, or to build the qualification rule using the Qualification Builder, click . For information about using the Qualification Builder, see Using the Qualification Builder.

Has Impact

Select the value (Yes or No) that indicates whether the attributes affect the relationship.

Impact Direction
Select the value from the list that the Normalization Engine must apply to the impact attributes of the relationship. 

Impact Propagation Model
Impact Weight

6. Click Save.

To edit an impact rule

  1. On the BMC CMDB Dashboard, click Configurations.
  2. From the list, select Manage Normalization Rules > Features.
  3. Click the Impact tab.
  4. Select an existing rule and click .
  5. On the Edit Impact Rule page, modify the parameters using the steps described in To create an impact rule.
  6. Click Save

    Note

    You cannot modify the class name of an existing impact rule.

To delete an impact rule

  1. On the BMC CMDB Dashboard, click Configurations.
  2. From the list, select Manage Normalization Rules > Features
  3. Click the Impact tab.
  4. Select an impact rule and click .
  5.  In the delete confirmation dialog box, click OK to delete the impact rule.

To enable or disable impact rules for a data set 

  1. On the BMC CMDB Dashboard, click Configurations.
  2. From the list, select Manage Normalization Rules > Dataset Configurations.



  3. Select a data set, and click .

  4. On the All Datasets Configurations page, select or clear the Auto Impact check box to enable or disable the Impact feature. 
    You can also edit an additional parameter that will affect the Impact feature.

    Note

    Only rules that are active are executed.

  The additional normalization impact mode settings are given below:

 Parameter Option Description



Preserve Auto Impact Edit
 

Apply Rule AlwaysOverwrites any manual edits that you have made to the HasImpact and ImpactDirection attributes of the relationship instances with the values that are defined in the best-practice impact normalization rules. 
For more information about the best-practice relationship instances, see Normalization and service impact.

Preserve Manual Edit

(Default) Retains any manual edits that you have made to the HasImpact and ImpactDirection attributes of the relationship instances, instead of reapplying the values that are defined in the best-practice impact normalization rules. 
For more information about the best-practice relationship instances, see Normalization and service impact.

For more information about other parameters, see Configuring normalization settings for datasets.

5. Click Save.


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