A project management methodology (PMM), as PRINCE2™, provides an integrated framework of processes with activities and referenced tools and techniques to be performed. It details what needs to be done, by whom, how, and when. Usually, it includes a complete set of practical templates as documented support for project management deliverable products. A methodology is generally prescriptive, and it deals with all project management organization roles.By contrast, a Standard like ISO 21500, or a Body of Knowledge (BoK) like APM BoK and PMI PMBOK, provides a large set of recommendations of good practices for project management, including competencies and described techniques, to be applied. These are not mentioning how activities should be performed, and do not provide management templates. They are non-prescriptive, are targeted to the project manager profession and might include interpersonal skills and/or possible codes of professional ethics.A Competence Baseline, like ICB IPMA , represents a general framework concentrated on description and integration of the competence elements for project management, professional behavior, and other project context relations, as seen by the project manager person.Project management standards, BOKs and PMMs differ, but just the differences make them to be complementary. As a consequence you may combine them for your specific practical purposes in project management.