Project phases are divisions within a project where extra control is needed to effectively manage the completion of a major deliverable. Project phases are typically completed sequentially, but can overlap in some project situations. The high level nature of project phases makes them an element of the project life cycle. A project phase is not a Project Management Process Group.

項目階段

為有效完成某些重要的可交付成果，而在需要特別控制的位置將項目分界，就形成項目階段。項目階段大多是按順序完成的，但在某些情況系也可重疊。項目階段具有的這種宏觀特性使之成為項目生命週期的足組成部份。