# AWS Resilience Hub resource grouping recommendations
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This section explains how to generate and review resource grouping recommendations in AWS Resilience Hub.

**Note**  
You can grant the necessary IAM permissions that are required to work with AWS Resilience Hub by using `AWSResilienceHubAsssessmentExecutionPolicy` AWS managed policy. For more information about AWS managed policy, see [AWSResilienceHubAsssessmentExecutionPolicy](security-iam-awsmanpol.md#security_iam_aws-assessment-policy).<a name="view-resource-grouping"></a>

**To view resource grouping recommendations**

1. In the navigation pane, choose **Applications**.

1. Choose **Add application** page, choose the application name for which you want to review resource grouping recommendations.

1. Choose the **Application structure** tab.

1. If AWS Resilience Hub displays an information alert, choose **Review recommendations** to view all the resource grouping recommendations. Else complete the following steps to manually generate resource grouping recommendations:

   1. Choose **Resources**.

   1. Choose **Get grouping recommendations** from **Actions** menu.

      AWS Resilience Hub scans your resources to check how they can be grouped in the best possible way into relevant AppComponents to improve the accuracy of the assessments. If AWS Resilience Hub learns that your resources can be grouped together, it displays an information alert for the same.

   1. If the information alert is displayed, choose **Review recommendations** to view all the resource grouping recommendations.

   You can identify the AppComponents in the **Review resource grouping recommendations** section using the following:
   + **AppComponent name** – Name of the AppComponent in which the resources will be grouped.
   + **Confidence level** – Indicates the confidence level of AWS Resilience Hub in the grouping recommendation.
   + **Resource count** – Indicates the number of resources that will be grouped in the AppComponent.
   + **AppComponent type** – Indicates the type of AppComponent.

**To view resources that will be grouped in AppComponents**

1. Complete the steps in **[To view resource grouping recommendations](#view-resource-grouping)** procedure and then return to this procedure.

1. In **Review resource grouping recommendations** section, select the check box (adjacent to the **AppComponent name**) to view all the resources that will be grouped together within the selected AppComponent. If you select multiple check boxes, AWS Resilience Hub displays a dynamically generated **recommendations selected** section that groups the selected AppComponents under their respective AppComponent type. Choose the number below each AppComponent type to view all the resources that will be grouped together within the selected AppComponent.

   You can identify the resources that will be grouped in the selected AppComponent in the **Resources** section using the following:
   + **Logical ID** – Indicates the logical ID of the resource. A logical ID is a name used to identify resources in your AWS CloudFormation stack, Terraform state file, myApplications application, or AWS Resource Groups.
   + **Physical ID** – The actual assigned identifier for the resource, such as an Amazon EC2 instance ID or an Amazon S3 bucket name.
   + **Type** – Indicates the type of resource.
   + **Region** – AWS Region in which the resource is located.

**To accept resource grouping recommendations**

1. Complete the steps in **[To view resource grouping recommendations](#view-resource-grouping)** procedure and then return to this procedure. 

1. In the **Review resource grouping recommendations** section, select all the check boxes adjacent to the **AppComponent name**. To find a specific AppComponent, enter the AppComponent name in the **Find AppComponents** box.
**Note**  
By default, AWS Resilience Hub displays all the resource grouping recommendations. To filter the table with previously rejected resource grouping recommendations, choose **Previously rejected** from the dropdown menu adjacent to the **Find AppComponents** box.

1. Choose **Accept**.

1. Choose **Accept** in the **Accept resource grouping recommendation** dialog.

   AWS Resilience Hub displays an information alert if the resource grouping is successful. If you have accepted only a subset of resource grouping recommendations, **Review resource grouping recommendations** section displays all the resource grouping recommendations that you have not accepted.

**To reject resource grouping recommendations**

1. Complete the steps in **[To view resource grouping recommendations](#view-resource-grouping)** procedure and then return to this procedure.

1. In **Review resource grouping recommendations** section, select all the check boxes adjacent to the **AppComponent name**. To find a specific AppComponent, enter the AppComponent name in the **Find AppComponents** box.
**Note**  
By default, AWS Resilience Hub displays all the resource grouping recommendations. To filter the table with previously rejected resource grouping recommendations, select **Previously rejected** from the dropdown menu adjacent to the **Find AppComponents** box.

1. Choose **Reject**.

1. Select one of the reasons for rejecting the resource grouping recommendation and then choose **Reject** in the **Reject resource grouping recommendation** dialog.

   AWS Resilience Hub displays an information alert confirming the same. If you have rejected only a subset of resource grouping recommendations, **Review resource grouping recommendations** section displays all the resource grouping recommendations that you have not accepted.