Project　portfolio　management　is　an　approach　based　on　the　knowledge　of　project　management,　in　which　the　management　system　focuses　on　a　combination　of　projects　with　specific　goals　and　conditions　and　is　considered　to　be　a　higher　level　of　project　management　in　organizations.　In　this　management　system,　the　main　objective　is　to　design　and　implement　projects　that　can　ultimately　facilitate　the　achievement　of　the　project　organization　for　its　strategic　goals.　Selection　of　suitable　projects,　proper　allocation　of　limited　resources　of　the　organization,　realization　of　the　emphasis　of　the　strategic　statement,　coordination　and　synergy　in　the　portfolio　of　organizational　projects　and　the　provision　of　health　The　organizational　relations　of　project　managers　are　among　the　most　important　theoretical　foundations　of　this　system.　In　this　paper,　the　purpose　of　presenting　concepts　related　to　this　approach　is　to　discuss　such　definitions,　models,　the　process　of　establishing　the　maturity　model　of　the　project　portfolio　management　system,　and　how　to　form　and　collate　the　project　portfolio.　The　description　of　the　nature　of　the　Project　Management　Offices　(PMO)　and　the　system　Project　Management　Office　(SPO)　is　another　topic　that　will　be　addressed　in　this　article.　©　Published　under　licence　by　IOP　Publishing　Ltd.