Service health score, impact score, and metrics

The service health score and service impact score are the two most important indicators of service health. The health and impact scores provide a quick insight into service health and enable you to take timely action. 

Service health score

The service health score is used to assess the health of a service. The service health score is computed for the selected time range using the impacted events associated with each of the service entities and the significance derived from service topology. The higher the health score, the healthier the service. The service health score ranges from 0 to 100.

The service health score is displayed on the service details page as shown in the following image:

The service health is represented using the color-coded severity values as shown in the following image:

If the service severity is Ok, the service is healthy. Any other severity value such as Critical, Major, Minor indicates that the service is impacted. 

Service health timeline

The service health score for the selected time range is represented by using the health timeline on the service details page. Here is an annotated screenshot of the service health timeline:

1. Time range selector. Click the arrow to change the time range. You can select a relative time range such as 3,6,12, and 24 hours. By default, Last3 hours time range is selected. Depending on the time range selected, the timeline is divided into equal-length time slots as shown in the following table:

   Time range	Length of each time slot
   3 hours	5 minutes
   6 hours	5 minutes
   12 hours	15 minutes
   24 hours	20 minutes

2. Service health score for a specific time slot on the health timeline. Hover over a time slot to view the health score. 

   What happens when there are different health scores in the same time slot?

   If there are different health scores in the same time slot, the latest health score will be displayed when you hover over the time slot. For example, consider a time slot between 8 PM and 8.05 PM (five minutes), and if there are 3 health scores such as 20, 60, and 50 in this time slot, the latest health score 50 is displayed when you hover over this time slot.

   The duration or length of each time slot is fixed, but the time window changes dynamically for each slot based on the current time. For example, consider the current system time is 8 PM, and you selected the Last 3 Hours option from the Health Time. In this case, the slots are plotted between 5 PM and 8 PM. Each slot is split into 5 minutes intervals starting from 5:00 to 5:05 PM and ending at 7:55 to 8:00 PM. If the same Health Time line is viewed at 8:01 PM for the last 3 hours, the range starts from 5:01 to 5:06 PM and ends at 7:56 to 8:01 PM.

   Therefore, the slot length or duration is maintained constantly (see Time range) based on the duration selected, but the time window for the slot changes dynamically based on the current selection and system time.

3. Legends to indicate incidents, events, and change requests on the health timeline. Hover over a legend on the health timeline to view event, incident, or change request details. For more information, see:
   • Event noise reduction indicator for prioritized triage and remediation
     The health timeline does not display the INFO and OK events.
   • Total incident count and mean time to resolve (MTTR) indicators for a reliable incidence-response process

   How do I derive insights using the event, incident, and change request legends?

   When you hover over a legend on the health timeline, the corresponding details are displayed along with the timestamp. If you find unusual occurrences of events, incidents, or change requests, hover over the legends, collate the details, and analyze them to resolve the issues.

   Example

   

   In the preceding example:
   The event count is 1 on 15/02/2021 at 12:37, and the event count is 10 on 15/02/2021 at 13:32. You can check the details of the events that occurred during this time slot and analyze the associated information to determine and resolve the error condition. Click the time slot to view the event details and to perform root cause isolation. For more information, see Performing ML-based root cause isolation of an impacted service. 

Service impact score

The service impact score indicates how the service is impacted because of its entities. The service impact score is inversely proportional to its health score. The higher the service impact score, the lower is its health.
Impact score = 100 - service health score

In BMC Helix AIOps, the service impact score is displayed on the service details page as shown in the following image:

The service health score is 90 in the example and hence the impact score is 10.

Metrics

Metric is an important performance indicator in your environment. For example, if you have a Linux monitoring solution and CPU monitor type, the following section lists a few example metrics that can be monitored:

• Utilization
• Load
• Idle time
• Context Switches

You can view the metrics associated with the top three events associated with the top 3 impacted nodes for a service. An example metrics chart is shown in the following image:

Where to go from here

Performing ML-based root cause isolation of an impacted service