the physical designer

基本解释

In most cases the designer can use a configuration that best fits the physical requirements of the system.
多数情况下由设计师根据系统的物理要求采用最适宜的配置。
To be effective, it must be simple enough to communicate the required data structure to the end user, yet detailed enough that the database designer can create the physical structure.
为了是数据模型更加有效，它必须足够简单以使最终用户能够沟通必需的数据结构，同时它也要足够详细以使数据库设计人员能够创建物理结构。
For example, a system designer is interested in the logical and physical aspects of a system, so the most useful forms are class and sequence diagrams rather than use-case and activity diagrams.
例如，系统设计人员对系统的逻辑和物理方面感兴趣，因此最有用的形式就是类和序列关系图，而不是用例和活动关系图。