The document discusses how to define the mission and vision of a Project Management Office (PMO) when first establishing it. It recommends starting with the end goal in mind and identifying the PMO's purpose, benefits, and goals through a mission and vision statement. Examples of concise and effective PMO mission and vision statements from other organizations are provided. The document also provides guidelines for creating a mission statement, focusing on the key measures of success, and creating a vision statement that inspires stakeholders.