PSP0 is the most basic level, enabling the software engineer to establish a ground floor development process, whereas PSP3 is the most complex, with a number of metrics and templates available to the software engineer.

• PSP0是最基础的，使软件工程师能够建立基本的开发过程，而PSP3是最复杂的，提供大量有效的度量标准和模板。