CAPM Practice: Demonstrate an understanding of project management planning

A milestone marks a significant point or event in the project schedule and has zero duration—it is a moment in time. A task duration represents the length of time required to complete a specific work activity and consumes time on the schedule.

**Why not A:** Both milestones and task durations can appear on a Gantt chart. A Gantt chart displays the full project schedule including activities with durations and milestones as diamond markers. The distinction is about duration, not where they appear.

**Why not C:** This reverses the relationship. Milestones have zero duration and do not require resources to complete — they are simply significant points in time. Tasks require resources and effort to complete their defined work.

**Why not D:** Milestones and task durations are used in both agile and predictive projects. The distinction between them is about duration (zero vs. defined), not about which project approach they belong to.