Quality Center 8 新架構
就如同海松寶說的，QC 已經提升成一個 Enterprise 的測試管理平台。相較於 TD，QC 使用 J2EE 架構開發，提供 Cluster 的功能，讓 QC 的擴充性(scalability)與可用性(availability) 都大幅提升。而且 QC server 也支援更多平台，如 Microsoft Windows、Red Hat Linux、Solaris。
以下是 TD 8 和 QC 8 架構差異的比較表：
| Subject | TestDirector 8.0 | Quality Center 8.0 |
|---|---|---|
| Technology |
|
|
| Operating Systems | Microsoft Windows |
|
| Clustering | Single server only | Full clustering support |
| Database Connectivity |
|
|
| Repository | Domain repository (TD_Dir). | Repository divided into two subdirectories:
|
| Virtual Directory | Virtual directory name is tdbin |
|
| Supported Databases |
|
|
| Site Administrator Data (domains, projects, and users) | Data stored in the doms.mdb file | Data stored in the Site Administrator schema on a database server |
| Common Settings | Data stored in the file system | Data stored in the database |
| User Authentication | Windows authentication | LDAP authentication |
