Why would you use product outlines?

Using product outlines is primarily beneficial for creating geometry that represents the overall size and shape of an assembly without needing to include detailed components. This is particularly useful in the early stages of design, where having a rough idea of the assembly's dimensions and spatial requirements helps in planning and visualizing how different parts will interact with one another.

By establishing a product outline, designers can communicate effectively about the general structure of the assembly to stakeholders and ensure that there is alignment on the design intent before progressing to more complicated aspects, like detailing components or creating reference sets. This foundational geometry acts as a guide for integration and organization, allowing teams to visualize requirements and spacing before committing to final designs.

While the other choices present valid functionalities within the Siemens NX environment, they do not specifically focus on the primary intent of utilizing product outlines for overall assembly visualization.