How are activities with zero duration described in project scheduling?

Activities with zero duration in project scheduling are referred to as milestones. Milestones are specific points in a project timeline that signify important events or stages in the project’s progress. They serve as markers to indicate when significant phases, approvals, or deliverables are achieved, allowing project managers and stakeholders to track the project's advancement without allocating time to the milestone itself.

This concept of a milestone is integral to project management, as it helps in monitoring progress and ensuring that the project remains on schedule. By representing key moments in a project, milestones provide clarity and focus, often used for reporting and assessing overall project health.

In contrast, critical path refers to the sequence of stages in a project that determines the minimum completion time. Dependencies describe how tasks are linked to one another, indicating how the completion of one task affects another. Deliverables are the outputs or results that must be completed and handed over at various stages of the project. While these concepts are critical to understanding project management, they do not specifically represent activities with zero duration like milestones do.