项目管理包含了许多内容，它是对项目管理专业知识的一个总结，正如法律、医药和会计等其它专业一样，这一知识体系也有赖于那些实践者和学者们对它加以应用和提高。整个项目管理知识体系不仅包括那些已经被求证过的理论知识和已经被广 泛加以应用的传统经验，而且还容纳了新的理论知识以及还没有被充分应用的先进经验。-Project management includes many elements, it is a project management expertise of a summary, as law, medicine and accounting and other professions, the knowledge system also depends on those practitioners and scholars to apply and improve it. The entire Project Management Body of Knowledge includes not only those who have been off to verify the theoretical knowledge and has been widely applied traditional experience, but also to accommodate a new theoretical knowledge and application has not yet been fully advanced experience.