---
title: Add application services for impact calculation
description: Specify the application services that must be considered during impact calculation to ensure accurate service impact assessment.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/it-operations-management/event-management/add-impact-cal-services.html
release: brazil
product: Event Management
classification: event-management
topic_type: task
last_updated: "2026-11-06"
reading_time_minutes: 1
breadcrumb: [Alert impact calculation, Manage and monitor alerts, Configure, Event Management, ITOM AIOps, IT Operations Management]
---

# Add application services for impact calculation

Specify the application services that must be considered during impact calculation to ensure accurate service impact assessment.

## Before you begin

Role required: evt\_mgmt\_admin, evt\_mgmt\_operator, or evt\_mgmt\_user

## About this task

Organizations may have thousands—or even hundreds of thousands—of application services. If a CMDB class is added to the em\_impact\_inclusion\_class.list table, then all application services related to that class are included in impact calculation. However, there are two possible scenarios:

-   Scenario 1: CMDB class is added to em\_impact\_inclusion\_class.list but you want only specific services to be considered for impact calculation. You can either:

    -   Remove the unwanted services from the em\_impact\_filter\_service.list, or
    -   Set their status to false in the em\_impact\_filter\_service.list.
    For information on how to remove the application service from the list, see [Remove application services from impact calculation](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/it-operations-management/event-management/remove-impact-cal-services.md).

-   Scenario 2: CMDB class is not in em\_impact\_inclusion\_class.list, so no services in this class are included in impact calculation. To include specific services, add them to the em\_impact\_filter\_service.list table and set their status to true.

The following procedure shows how to add an application service directly to the em\_impact\_filter\_service.list table so that it is considered for impact calculation.

## Procedure

1.  Navigate to **All** and search for `em_impact_filter_service.list`.

    The Impact Filter Services page opens.

    \[Omitted image "em-impact-cal-app-services-list.png"\] Alt text: A list of application services that are included in impact calculation.

2.  Select **New**.

    \[Omitted image "em-impact-cal-app-services-new.png"\] Alt text: Impact Filter Service details page.

3.  In the **Service** field, select the search icon \(\[Omitted image "List\_SearchIcon.png"\] Alt text: search icon\).

    **Note:** By default, the **Calculate impact** check box is selected.

4.  In the Service Instances page, select the service that you want to add for the impact calculation.

    \[Omitted image "em-impact-cal-app-service-selection.png"\] Alt text: Service Instances page to select a service.

5.  Select **Submit**.

    The application service adds to the list of impact filter services.

    \[Omitted image "em-impact-cal-app-services-added.png"\] Alt text: The selected application service is added.

    **Note:** Only the application services added to the Impact Filter Services list appear in the [Service Dashboard](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/it-operations-management/worksplace-view-service-details.md).