CAPM Practice: Demonstrate an understanding of project management planning

A milestone marks a significant point or achievement in the project timeline and has zero duration—it's a moment in time. Task duration measures the length of time needed to complete a specific activity and consumes time on the schedule.

**Why not A:** Milestones and task durations are used in both agile and predictive projects. The distinction is not about project methodology but about the nature of the schedule element: milestones are zero-duration reference points, while task durations represent the time to complete work.

**Why not C:** Milestones can occur at any significant point in the project, not only at the end of phases. "Foundation Complete" marks the completion of a specific deliverable, which is not necessarily a phase boundary. Task durations apply to all activities throughout the project.

**Why not D:** Milestones do not require resources or budget allocation — they have zero duration and represent a point in time. Tasks are the schedule elements that consume resources and budget to complete their defined work activities.