Being clear about the business objectives for implementing a PMO or developing its role is essential if it is to deliver significant improvements in project performance and justify the cost. Which and how many of the four objectives we described at the start are relevant will depend on the business problems the PMO is intended to overcome. Once the problems are clear and agreed, the type and range of services required to address them can be defined. This will determine the type of PMO that is needed. Only then can the type of skill and expertise needed by the PMO.