The term project phase refers to a collection of activities within a project. Each project phase is goal-oriented and ends at a milestone. Reaching these milestones means the project progresses. Each phase can be divided into sub-phases. The project plan (e. g. a project network diagram) clarifies the systematic hierarchy of the individual phases and establishes dependencies among them.
If project phases are part of an iterative project plan, e. g. in agile project management, the individual phases can overlap as individual steps or tasks from one phase can be adopted in another phase for optimization.
Typical project phases are: