The greater the maturity of a PMO:

As the maturity of a PMO increases, it often shifts from providing basic support to delivering more strategic value. This shift in focus helps generate greater value for PMO stakeholders by aligning project outcomes with the organization's broader strategic goals. A mature PMO supports better decision-making, risk management, and resource allocation, leading to enhanced stakeholder satisfaction. Simply increasing the number of functions, team size, or costs does not inherently guarantee value; instead, the focus should be on delivering outcomes that matter most to stakeholders​​.