What type of dependencies rely on external resources or forces?

The correct choice refers to physical dependencies, which are characterized by their reliance on external resources or constraints that can affect the project. Physical dependencies involve tangible factors such as the availability of materials, equipment, or environmental conditions that must be present for certain project tasks to begin or proceed. For instance, if construction cannot start until a specific piece of equipment is delivered, that establishes a physical dependency.

These dependencies are critical in project planning because they can significantly impact timelines and resource allocation. Understanding these dependencies helps project managers anticipate potential delays and plan accordingly.

Other types of dependencies, such as logical dependencies, typically relate to the sequence of tasks and the logical relationship between them rather than external constraints. Resource dependencies focus more on the allocation and availability of human or material resources rather than forces outside the project. Managed dependencies involve aspects that are controlled or influenced by project management practices, further differentiating them from physical dependencies that rely predominantly on external factors.