By default, the business impact rating is based on the criticality of impacted business CIs, and the number of impacted business CIs. You can assign each of these metrics relative weights and thresholds. For an overview of this rating system, see How to Configure the Business Impact Component.
To customize how the business impact rating is calculated, open Infrastructure Settings:
Administration > Setup and Maintenance > Infrastructure Settings
Alternatively, click Infrastructure Settings.
Access Applications > Business Impact Service.
Open the Configuration XML file for editing by clicking the pencil icon. Within the XML file, each section beginning with <metric class= defines one of the calculation options, as follows:
-
id="BasedOnNumOfBusinessEntities" defines the parameters used to calculate CI impact, based on the number of business CIs that a CI impacts.
-
id="BasedOnNumOfSLAs" defines the parameters used to calculate CI impact, based on the number of SLAs that a CI impacts.
-
id="BasedOnCriticality" defines the parameters used to calculate CI impact, based on the criticality of the business CIs that a CI impacts.
You can perform the following customizations to modify how the ratings are calculated.
Define which metrics are used in the calculation
Within one of the lines beginning with metric id, locate the string weight="<value>". If this value is zero, the metric is not used in calculating the rating; if this value is 1, the factor is used to calculate the rating.
Calculate based on highest degree of criticality or on average criticality
By default, the business impact rating is based on the highest degree of criticality of the impacted business CIs. You can modify which rule is used to calculate the rating based on criticality, and use average criticality instead.
Locate the line with id="BasedOnCriticality" ruleId="1". The string ruleId="1" defines that the highest degree of criticality is used to calculate the rating.
To calculate the rating based on the average criticality of business CIs that are impacted by the CI, modify this to ruleId="3".
Define relative weights for each of the metrics used in the calculation
If you include more than one metric in the calculation, you can assign relative weights to each metric.
Within one of the lines beginning with metric id, locate the string weight="<value>". This value defines the relative weight of each metric in the overall calculation, so that if you define the weight of one metric as 1, and of another metric as 2, the first metric defines 1/3 of the overall rating and the second metric defines 2/3 of the overall rating.
Assign thresholds to the metrics that count impacted business CIs
By default, if you choose to calculate the rating based on the number of impacted business CIs, the rating is based on the percentage of impacted CIs from the total number of relevant CIs in your environment.
You can define custom thresholds so that if a specific number of CIs are impacted by a CI, this is mapped to a specific rating, as follows:
-
Within the XML file, locate the metric for which you want to define thresholds, either in the section metric id="BasedOnNumOfBusinessEntities" (based on the number of business CIs that a CI impacts).
-
Within the area headed <thresholds>, define thresholds according to the following format:
<threshold value="<number of impacted CIs>" valueMapping="<rating percentage mapped to this threshold value>" />
For example, suppose you define thresholds as follows:
- <thresholds>
- <!--
<threshold value="1" valueMapping="20" />
<threshold value="2" valueMapping="40" />
<threshold value="3" valueMapping="60" />
<threshold otherwise="80" />
-->
</thresholds>
This means that if a CI impacts one CI, its business impact is mapped to 20%, giving it a rating of 1 (out of 5). If this CI impacts 2 or 3 CIs, it rating is 2 or 3 respectively. If the CI impacts more than 3 CIs, it is mapped to 80%, with a rating of 4.
Note that this mapping defines the business impact rating, independent of the total number of business CIs in your environment.