# RFC mode
<a name="rfc-mode"></a>

RFC mode is the default mode for AMS Advanced operations plan customers. It includes a change management system with requests for change or RFCs and a catalog of change types to use to request the addition or change that you need to your accounts. This change management system provides a level of security in limiting who can make changes to your accounts.

For details on AMS Advanced change types, see [What Are AMS Change Types?](https://docs.aws.amazon.com/managedservices/latest/ctref/index.html).

For details about onboarding to AMS Advanced, see [AWS Managed Services Onboarding Introduction](https://docs.aws.amazon.com/managedservices/latest/onboardingguide/index.html).

For change type example walkthroughs, see the "Additional Information" section for the relevant change type in the *AMS Advanced Change Type Reference* [Change Types by Classification](https://docs.aws.amazon.com/managedservices/latest/ctref/classifications.html) section.

**Note**  
RFC mode was previously called "Change Management mode" or "Standard CM mode."

**Topics**
+ [Learn about RFCs](ex-rfc-works.md)
+ [What are change types?](understanding-cts.md)
+ [Troubleshooting RFC errors in AMS](rfc-troubleshoot.md)