Scenario

Company A is an enterprise user and has multiple project teams that require different resources and personnel. This topic presents the best practice for multi-project management to address company A's requirements.

Requirements

Requirement 1: Company A can create multiple types of resources in region_01 and region_02 for two project teams. Resources of the two project teams need to be isolated from each other.
Requirement 2: Each member of the project teams can access only the resources of the project team to which the member belongs, and only has the permissions required to complete tasks.

Solution

Solution to requirement 1: Enterprise Management and Identity and Access Management (IAM) are two cloud services that can isolate resources between projects. However, the implementation logic and functions of the two services are different.
- Enterprise Management: You can create enterprise projects to group and manage resources across regions. Resources in enterprise projects are logically isolated from each other. Each enterprise project can contain resources of multiple regions, and resources can be added to or removed from enterprise projects.
- IAM: IAM projects group and physically isolate resources in a region, and each IAM project can only contain resources in the same region. Resources cannot be transferred between IAM projects.

In conclusion, Enterprise Management provides more flexible cross-region resource isolation between projects than IAM. Therefore, it is recommended that company A use Enterprise Management to manage project resources. The solutions to the following requirements are proposed using the Enterprise Management service. For details about the two services, see What Are the Differences Between IAM and Enterprise Management?.

Solution to requirement 2: In IAM, company A creates IAM users for employees and adds the IAM users to different groups. In Enterprise Management, company A adds the user groups to the enterprise projects created to address Requirement 1 and assigns required resource access permissions (see Table 1) to each user group.

Figure 1 Personnel management model of company A

**Table 1** User group permissions in company A
User Group	Responsibility	Permissions	Description
Development team	Project development		Full permissions for Elastic Load Balance (ELB)
		OBS Administrator	Full permissions for Object Storage Service (OBS)
		EPS FullAccess	Full permissions for Enterprise Management
Security maintenance team	Security O&M of the project	ECS CommonOperations	Permissions for basic ECS operations
Operations team	Overall operations of the project	EPS FullAccess	Full permissions for Enterprise Management, including modifying, enabling, disabling, and viewing enterprise projects