# Member and Permission Management
In the TE system, permissions can be divided into system permissions and project permissions, which are respectively granted by syste and project roles and data permissions. This chapter only focuses on project permissions. If you want to learn about system permissions such as those concerning O&Ms and auditing, please see System Management.
Each TE account corresponds to a member, which can exist simultaneously in many projects. You can control members' feature permissions in a project via Project Roles and their data permissions via Data Access.
In the following chapters, we will describe:
# Member Management
Add/remove members, adjust a member's role and data access within the project.
# Role Settings
View or customize roles and flexibly assign permissions.
# Data Access
Control the data that can be accessed by a member in the project, including visibility setting, scope of data and data desensitization settings.