PMO maturity is defined by how well each function of the PMO is carried out, rather than the hierarchical position or strategic influence alone. A more mature PMO will execute its functions, whether they are operational, tactical, or strategic, with a high level of sophistication and efficiency. This sophistication often comes from well-developed processes, tools, and competencies in managing projects and resources. It also indicates how well the PMO adapts to the organization's changing needs.