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 represents a moment in time. A task duration represents the amount of time needed to complete a specific work activity and has a measurable length (hours, days, weeks, etc.).

**Why not A:** Milestones are used in both agile and predictive projects. They are not methodology-specific. In any approach, milestones mark key achievements or decision points, while task durations measure the time to complete work.

**Why not C:** Milestones can occur at any point in the project, not just at the end of phases. They mark significant events such as approvals, deliverable completions, or key decision points throughout the entire project lifecycle.

**Why not D:** A milestone has zero duration, not one day. It represents a point in time, not a period. Task durations can range from hours to weeks, but the key distinction is that milestones mark moments while tasks span time.