Developments in the project management field are ongoing. This professional fieldcontinuously broadens and becomes profounder. Therefore, IPMA has extended itsattention from project management to program management, portfolio management andproject support (PMO).This has made manifest the need for a reference model in which the various functions andcorresponding competences and the relations between them are presented. Not only for HRmanagers, but also for project and program managers and PMO ...