Which modeling technique helps project managers visualize the scope of a project?

The context diagram is particularly effective for project managers in visualizing the scope of a project because it provides a high-level overview of the system or project in relation to its external entities. It illustrates how these entities interact with the scope of the project, allowing stakeholders to easily understand what is included within the project boundaries and what is outside of them.

By clearly defining the inputs and outputs to and from the system, as well as the external actors involved, the context diagram aids in establishing a common understanding among project stakeholders. This helps ensure that everyone involved has clarity on the project's parameters, thereby reducing the risk of scope creep and miscommunication throughout the project lifecycle.

In contrast, flowcharts focus on the steps or processes within a system; pie charts display statistical data rather than project scope; and mind maps are useful for brainstorming ideas but may not effectively represent the structured scope relationships that the context diagram provides.