What is a drawback of using calendar and bar chart scheduling methods?

The correct choice highlights a significant limitation of calendar and bar chart scheduling methods: they do not effectively depict the interdependencies of activities within a project.

Calendar and bar charts, while useful for visualizing timelines and tracking progress, often present tasks in a linear fashion without illustrating how tasks are interconnected. This can lead to misunderstandings about which activities rely on the completion of others, potentially resulting in scheduling conflicts and inefficiencies. Understanding these dependencies is crucial for effective project management, as it allows for better planning, risk assessment, and resource allocation.

By contrast, other scheduling techniques, such as network diagrams (like the Critical Path Method), provide a clearer view of the relationships and dependency chains among tasks, leading to more informed decision-making and scheduling accuracy.