What term refers to elements that are outside the boundary from an external perspective, such as in a context diagram?

The term that refers to elements that are outside the boundary from an external perspective, particularly in the context of a context diagram, is "out-of-scope." This designation helps clarify what is not included in the project or system under consideration. In the context of requirements gathering and analysis, understanding what is out-of-scope is essential for managing project expectations and delineating the boundaries of the project. By identifying and explicitly stating what is out-of-scope, stakeholders and developers can ensure that their focus remains on relevant aspects of the project without confusion or misalignment regarding what needs to be addressed.

This term is particularly important in creating context diagrams, as these diagrams visually represent the system's boundaries and its interactions with external entities, clearly distinguishing between what is part of the system and what lies beyond its operational boundaries.