首先，我们来看掌握PMO职责的小TIPS，以下是PMBOK的原话：
A primary function of a PMO is to support project managers in a variety of ways which may include, but are not limited to:
Managing shared resources across all projects administered by the PMO;
Identifying and developing project management methodology, best practices, and standards;
Coaching, mentoring, training, and oversight;
Monitoring compliance with project management standards, policies, procedures, and templates via project audits;
Developing and managing project policies, procedures, templates, and other shared documentation (organizational process assets); and
Coordinating communication across projects.

如何把PMO的职责都记住呢？因为这里很可能会考一个选择题！
方法就是：PMO
其中P是指policies, procedures；以及across all projects
M是指methodology，mentoring，Monitoring
O是指Coordinating
记住关键词，PMO的职责就记住了！