美国项目管理学会的PMI资格认证之所以能在如此广的行业和地域范围内被迅速认可，首先是项目管理本身的重要性和实用性决定的，其次很大程度上是得益于该项认证体系本身的科学性。 PMI早在七十年代末就率先提出了项目管理的知识体系（Project Management Body of Knowledge, 简称为PMBoK）。 　　该知识体系构成PMP考试的基础。它的第一版是由PMI组织了200多名世界各国项目管理专家历经四年才完成，可谓集世界项目管理界精英之大成，避免了一家之言的片面性。而更为科学的是每隔数年，来自于世界各地的项目管理精英会重新审查更新PMBOK 的内容，使它始终保持最权威的地位。-American Project Management Institute s PMI certification has been able to in such a wide range of industries and geographies are quickly recognized, first of all the project management itself, the importance and usefulness of the decision, followed by largely due to the certification the scientific system itself. PMI back in the late seventies, first proposed the project management body of knowledge (Project Management Body of Knowledge, referred to as PMBoK). This knowledge constitutes the basis for PMP exam. Its first edition was organized by the PMI has more than 200 countries around the world after four years of project management experts to complete, project management can be described as the world s elite set the culmination of one of the words to avoid one-sidedness. The more science is every few years, from the elite world of project management will review the contents of PMBOK updated so that it always maintain the most authoritative position.