# COST04-BP03 Decommission resources
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 Decommission resources triggered by events such as periodic audits, or changes in usage. Decommissioning is typically performed periodically, and is manual or automated. 

 **Level of risk exposed if this best practice is not established:** Medium 

## Implementation guidance
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The frequency and effort to search for unused resources should reflect the potential savings, so an account with a small cost should be analyzed less frequently than an account with larger costs. Searches and decommission events can be triggered by state changes in the workload, such as a product going end of life or being replaced. Searches and decommission events may also be triggered by external events, such as changes in market conditions or product termination.

**Implementation steps**
+  **Decommission resources: **Using the decommissioning process, decommission each of the resources that have been identified as orphaned. 

## Resources
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 **Related documents:** 
+  [AWS Auto Scaling](https://aws.amazon.com/autoscaling/) 
+  [AWS Trusted Advisor](https://aws.amazon.com/premiumsupport/trustedadvisor/)