Methodology
What is a milestone
in project management?
A milestone is a key event marking an important stage or the end of a phase in a project..
How does a milestone work?
Unlike a task, a milestone has no duration: it represents a single point in time, such as a phase sign-off or a deliverable handoff.
Why use milestones in a project?
They let teams structure a project into major stages and communicate progress to stakeholders without getting into every task-level detail.
Real-world example
In a software project, "testing complete" or "go-live" are milestones marking key stages — regardless of how many individual tasks it took to get there.
What are the pros and cons of using milestones?
A milestone makes it easy to communicate progress at a high level. Its limit: on its own, it doesn't show the underlying tasks or any delays behind them — it needs to be paired with a detailed schedule.
Key takeaways
- A zero-duration event marking a stage or phase end.
- Used to communicate progress at a high level.
- Shifts automatically if the tasks leading up to it run late.
Visual Planning lets you place and track milestones directly on your project's Gantt chart.
Frequently asked questions
Does a milestone have a duration?
No, unlike a task, a milestone represents a single point in time with no duration.
How many milestones should a project have?
There's no fixed number, but it's best to limit them to genuinely significant stages so they don't lose their communication value.
Can a milestone slip?
Yes, if the tasks leading up to it run late, the milestone date shifts accordingly.
What's the difference between a milestone and a critical-path task?
A milestone marks a point in time with no duration, while a critical-path task has a duration that, if delayed, pushes back the project's finish date.
Related terms
Gantt Chart
Project Management
Critical Path
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