> For the complete documentation index, see [llms.txt](https://xoops.gitbook.io/xoonips-tutorial/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xoops.gitbook.io/xoonips-tutorial/1overview/2.-main-features/23quality-maintenance_workflow.md).
# 2.3. Quality-maintenance workflow
## 2.3.1. Certification system for new user registrations
To obtain a new account, the requester has to be checked / identified by the moderator to decide whether or not to certify the user as a registered user.
To prevent from malicious users.
**Figure 1.4. User registration**
## 2.3.2. Item peer-review system
The items to be registered and shared in the public and a group area have to be peer-reviewed by the moderator or group administrator. (Optional)
To manage quality control
**Figure 1.5. peer-review system**