Resource Access Management (RAM) is an Alibaba Cloud service that helps you centrally manage user identities and resource access permissions. If multiple employees or applications in your enterprise need to access Cloud Architect Design Tools (CADT), you can use RAM for centralized permission management and to assign different access permissions as needed. Before you use RAM to manage access permissions for Alibaba Cloud products, you must understand how each product works with RAM features. This helps you design an access control solution that meets your business needs. This topic describes the RAM features that CADT supports and how you can use them.